US20210226405A1 - Scalable high power fiber laser - Google Patents
Scalable high power fiber laser Download PDFInfo
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- US20210226405A1 US20210226405A1 US17/222,313 US202117222313A US2021226405A1 US 20210226405 A1 US20210226405 A1 US 20210226405A1 US 202117222313 A US202117222313 A US 202117222313A US 2021226405 A1 US2021226405 A1 US 2021226405A1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/094042—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a fibre laser
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/0675—Resonators including a grating structure, e.g. distributed Bragg reflectors [DBR] or distributed feedback [DFB] fibre lasers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/094049—Guiding of the pump light
- H01S3/094053—Fibre coupled pump, e.g. delivering pump light using a fibre or a fibre bundle
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/09408—Pump redundancy
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/0941—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode
- H01S3/09415—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode the pumping beam being parallel to the lasing mode of the pumped medium, e.g. end-pumping
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
- H01S5/4012—Beam combining, e.g. by the use of fibres, gratings, polarisers, prisms
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B9/00—Measuring instruments characterised by the use of optical techniques
- G01B9/02—Interferometers
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/43—Arrangements comprising a plurality of opto-electronic elements and associated optical interconnections
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06704—Housings; Packages
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06754—Fibre amplifiers
Definitions
- the field of the present invention is high power fiber lasers. More particularly, the present invention relates to scalable high power continuous-wave and quasi-continuous-wave fiber lasers.
- Conventional multi-kilowatt industrial fiber laser systems typically employ a non-scalable architecture consisting of multiple component fiber lasers whose outputs are combined with a fused-fiber signal combiner.
- the total fiber laser system output power is typically in the range of 2 to 6 kW, and the individual component fiber lasers typically have a power in the range of 0.4 to 1.0 kW.
- the outputs from multiple fiber lasers typically two to ten must be combined.
- the fused-fiber signal combiner causes optical loss and diminishes the beam quality of the individual fiber laser outputs received. This loss negatively impacts efficiency, which determines power consumption and waste-heat generation, and beam quality degradation can reduce the speed in metal-cutting applications. Furthermore, the signal combiner is expensive, requiring costly equipment and considerable process development and control for fabrication, and it can experience unpredictable variation impacting reproducibility and reliability. Fused-fiber signal combiners are also subject to operational damage, including from optical feedback from the work piece, thereby decreasing system reliability.
- a fused signal combiner may include empty ports for receiving additional component fiber lasers.
- the beam quality of output beam is degraded whether or not the extra ports are populated with additional component fiber laser system outputs.
- upgrading system output power requires the replacement of one or more of the component fiber lasers with a component fiber laser of higher power. Replacing component fiber lasers is expensive, particularly since there is attendant with it limited or no re-use of the replaced component fiber laser, subsystems, or components.
- a modular and scalable high power fiber laser system configurable to generate 1 kW or more of laser output includes one or more separable pump modules separately disposed from each other, each pump module including a plurality of fiber-coupled component pump sources optically combined by one or more fiber-based pump module pump combiners, each pump module providing one or more pump module fiber outputs, and a gain module separately disposed from the one or more separable pump modules and including one or more gain module pump fiber inputs optically coupled to corresponding ones of the pump module fiber outputs, and including a gain fiber optically coupled to the one or more gain module pump fiber inputs, the gain fiber configured to generate a gain module fiber output power scalable in relation to the number and power of the pump module fiber outputs coupled to the gain fiber.
- a high-power fiber laser system includes a gain module configured to generate an output beam of 1 kW or greater at an output beam wavelength, and one or more pump modules optically coupled to the gain module and configured to generate light at a pump wavelength for optically pumping the gain module, wherein the gain module is configured to receive pump light from the one or more pump modules such that the power of the output beam is scalable in accordance with the number and power of pump modules coupled to the gain module.
- FIG. 1A is a perspective view of a fiber laser system in accordance with an aspect of the present invention.
- FIG. 1B is a connectivity diagram of the fiber laser system depicted in FIG. 1A in accordance with an aspect of the present invention.
- FIG. 2 is a plan view schematic of a fiber laser system in accordance with an aspect of the present invention.
- FIG. 3A is a schematic of a pump module of a fiber laser system in accordance with an aspect of the present invention.
- FIG. 3B is a schematic of a pump module of a fiber laser system in accordance with an aspect of the present invention.
- FIG. 4 is a schematic of another pump module of a fiber laser system in accordance with an aspect of the present invention.
- FIG. 5 is a schematic of another pump module of a fiber laser system in accordance with an aspect of the present invention.
- FIG. 6 is a schematic of a gain module of a fiber laser system in accordance with an aspect of the present invention.
- FIG. 7 is a schematic of another gain module of a fiber laser system in accordance with an aspect of the present invention.
- FIG. 8 is a schematic of another gain module of a fiber laser system in accordance with an aspect of the present invention.
- FIG. 9 is a schematic of another gain module of a fiber laser system in accordance with an aspect of the present invention.
- FIG. 10 is a schematic of another gain module of a fiber laser system in accordance with an aspect of the present invention.
- FIG. 11 is a rear view of a gain module combiner of a fiber laser system in accordance with an aspect of the present invention.
- FIG. 12 is a rear view of another gain module combiner of a fiber laser system in accordance with an aspect of the present invention.
- FIG. 13 is a schematic of another gain module of a fiber laser system in accordance with an aspect of the present invention.
- FIG. 14 is a schematic of a combiner stage in accordance with an aspect of the present invention.
- FIG. 15 is a schematic of another gain module of a fiber laser system in accordance with an aspect of the present invention.
- FIG. 1A A perspective view of a first embodiment of a highly configurable, modular, and scalable continuous-wave or quasi-continuous-wave high-power fiber laser system 1000 is shown in FIG. 1A .
- the fiber laser system 1000 includes several bays 1001 which modularly receive different system modules, including system pump modules 1002 and system gain modules 1003 , each which can be configured to be separable from the fiber laser system 1000 .
- Additional modules such as a control module 1004 or a power supply module, also can be modularly disposed in relation to the other system modules of the system 1000 .
- the scalable multi-kilowatt fiber laser system 1000 is depicted in an optional mobile configuration, with a plurality of system modules disposed in a vertical rack arrangement mounted atop a plurality of casters 1005 for convenient movement in an industrial environment.
- Pump modules 1002 provide one or more pump module fiber outputs 1006 which are optically coupled to one or more gain modules 1003 .
- Fiber laser system 1000 includes a system output 1007 providing about 1 kW or more of output power for various industrial applications and which can be provided by the one or more gain modules 1003 .
- Output power of the system can be scaled by adding additional pump modules 1002 in available system bays 1001 or by upgrading installed pump modules 1002 by swapping old with new.
- a configuration with a single pump module 1002 and a single gain module 1003 can provide a particular system output power which can be upgraded by installing an additional pump module 1002 (see pump module 1002 shown in dashed lines in FIG. 1 ) and splicing the pump module output 1006 to the gain module 1003 . Due to the modularity, size and weight can be divided between pump and gain modules such that a single person in the field or factory can carry, implement, or service each pump and gain module of the system.
- the form factor of the laser system can also be configured to support different deployment scenarios.
- system modules can be mounted in a rack vertically as shown in FIG. 1 , horizontally, or in another orientation, or combination thereof. Modules can be physically separated from each other to facilitate integration into a desired space.
- FIG. 1B a schematic is shown for an embodiment of a system 1010 similar to that shown in perspective view in FIG. 1A .
- the system 1010 includes a plurality of pump modules 1011 providing pump energy to a gain module 1012 which is configured to generate a laser system output 1013 .
- the system 1010 can include one or more expansion slots 1014 to provide configuration changes to the system 1010 , such as additional pump or gain modules.
- a cooling system 1015 is coupled to the pump and gain modules to provide thermal stability therein and to the system 1010 as a whole.
- the system 1010 is controlled by a controller 1015 configured to monitor and adjust outputs and other properties of the pump modules, gain modules and cooling system.
- the fiber laser system 20 is highly configurable and modular such that the system 20 can be manufactured ab initio for operation at a pre-selected range of output powers, such as between 1 kW or less and multiple KWs, and for upgrade to higher output powers or different performance criteria.
- the fiber laser system 20 includes one or more component pump modules 22 each separately disposed from the other and modularly separable from the system 20 .
- Each component pump module 22 provides one or more component pump module outputs 24 .
- the fiber laser system 20 also includes one or more gain modules 26 separately disposed from each other and modularly separable from the system 20 .
- the one or more gain modules 26 are optically coupled to the one or more component pump module outputs 24 , such that a fiber laser system output beam 28 is produced at a predetermined output power.
- a single gain module 26 provides the system output beam 28 by utilizing the pump power of three pump modules 22 coupled to the gain module 26 .
- Slots for additional modularly separable pump modules 22 are shown with spots 23 while corresponding additional pump module outputs for coupling to the gain module 26 are shown with dashed lines 27 .
- Gain module 26 includes a gain fiber incorporated into a laser oscillator 30 providing laser oscillation between opposite fiber Bragg gratings 31 .
- the gain fiber of the gain module 26 includes optical fiber sized to accommodate a predetermined highest output power for the fiber laser system 20 .
- selected maximum operating output powers are in the kW range, such as 1 kW, 2 kW, 3 kW, 4 kW, 5 kW, or higher.
- the maximum output power of the fiber laser system 20 is determined by the number and output power of pump modules 22 capable of being spliced to the gain module 26 .
- the fiber laser output beam 28 can be produced without using a plurality of redundant oscillator or amplifier systems, without redundant supporting mechanical and electrical components, and without using a signal combiner to combine a plurality of redundant component fiber laser outputs.
- the separate and modular nature of the pump and gain modules 22 , 26 allows each to be serviced separately. For example, if a fiber failure occurs in the gain module 26 , the gain module 26 can be replaced while each of the installed pump modules remains intact without any or substantial modification. Similarly, if a pump module 22 fails in some fashion, the pump module 22 can be replaced, leaving each other pump module 22 and the gain module 26 in place without any or substantial modification thereof. Systems herein provide robustness advantages as potential failures are more likely to be isolated to particular system modules, which can be interchanged and upgraded without replacing an entire system.
- a pump module 22 includes one or more semiconductor diode laser modules 34 each including one or more semiconductor diode lasers providing one or more diode laser output beams combined and coupled to a diode laser module output optical fiber 36 .
- a plurality of output optical fibers 36 are optically coupled to a pump module pump combiner 38 to combine the diode laser module pump light into a pump module output 24 .
- Pump module pump combiners 38 are configured to transmit low-brightness multimode pump light in a large core, as opposed to signal combiners, which transmit high-brightness signal light in a small core. Pump combiners are often manufactured at less cost than signal combiners since the performance requirements, such as beam quality at the combiner output and optical insertion loss, are typically less demanding.
- Combined pump light is coupled out of the pump module 22 through one or more pump module outputs 24 .
- the pump module outputs 24 are optically coupled (e.g., by fiber splicing) to the gain module 26 onto a fiber combiner 40 thereof.
- the fiber combiner 40 can be the similar in design to the pump module pump combiner 38 associated with each pump module 22 .
- the combiner in the gain module can be a pump-signal combiner, which transmits both signal and pump light.
- pump-signal combiners can be used at a back end of the gain module gain fiber, at a front end of the gain fiber to launch counter-propagating pump light, within or between gain stages (e.g., between an oscillator and an amplifier or between amplifiers), or some combination thereof.
- splicing requirements are relaxed concomitantly, allowing for in situ splicing of the pump module outputs 24 to selected gain module inputs of the fiber combiner 40 under less than clean-room conditions using commercially available equipment. Alignment sensitivity and cleave-angle requirements are lower for splicing outputs 24 to fiber combiner 40 as compared to the splicing of fibers to signal combiners, also contributing to the accessibility of splicing fibers to the fiber combiner 40 in a factory or other field environment.
- pump module outputs 24 are coupled to gain module 26 via connectors pluggable into the pump module or the gain module or both, eliminating the need for splicing and further enhancing modularity of the fiber laser system.
- the modular separation of the pump modules and gain module allows for field upgradability of the system 20 to higher allowable output powers.
- additional pump modules 22 can be spliced to open pump fiber inputs of the fiber combiner 40 of the gain module.
- Additional pump modules 22 can be identical to or different from existing modules 22 spliced to the gain module 26 such that laser output 28 of the system 20 can be selectably scaled to higher powers.
- the procedure for splicing the pump module outputs 24 of the additional pump modules 22 to the fiber inputs of the fiber combiner 40 is relatively simple and can be performed in a factory or other field environment.
- the modular separation between pump modules and gain module also allows for scalable power output of the system 20 because the physical separation between pump modules and between the gain module and pump modules reduces or eliminates thermal crosstalk between modules.
- Each module can be provided with independent water-cooling ports such that modules can be cooled separately or cooled together in parallel or in series.
- a 3 kW fiber laser output power can be generated with three 1.5 kW pump modules being spliced to the gain module.
- building or upgrading the fiber laser system to have three 2.0 kW pump modules can provide a 4 kW fiber laser output power.
- one or more backup pump modules can be provided in the fiber laser system 20 for use in the event of the failure of another pump module.
- the system 20 can be configured to switch over to the backup pump modules immediately upon failure, or slowly as one or more other active pump modules degrade over a period of time.
- the separable nature of the pump modules further allows for failed modules to be replaced in situ with new pump modules without affecting the operation of the backup pump modules or fiber laser system.
- the modularity of system 20 provides for adaptability to various technology improvements, ensuring compatibility of the system 20 and its existing modules with the pace of innovation in the laser industry.
- improvements in pump diode technology could provide for an upgraded pump module 22 .
- the upgraded pump module can be substituted for an existing pump module 22 or can be used in addition to existing pump modules 22 , providing improved system performance, efficiency, cost, or any combination thereof, without requiring significant design changes or replacement of components that have not been upgraded.
- improvements in gain module technology such as oscillator or amplifier architecture might provide for an upgraded gain module 26 .
- the upgraded gain module can be substituted for the existing gain module 26 without requiring replacement or modification of the pump modules.
- the various substitutions can again be performed in the field or factory environment.
- single-mode output beam quality is not required. Accordingly, conventional architectures typically combine the outputs of fiber lasers producing single-mode signal beams using a signal combiner to produce a multimode output beam.
- the gain module 26 does not produce single-mode output since such output is not required for many applications. Because the desired output is multimode, systems 20 can achieve such output without the need for the complexity of single-mode combination. Also, because single-mode operation of the gain module 26 is not required, the ability to scale the power of the gain module 26 to multiple kW outputs is more accessible.
- Allowing the gain fiber of the gain module 26 to be multimode facilitates power scaling in a more practical manner than by maximizing the single-mode output power of an individual fiber laser since the single-mode power limit is lower than the multimode power limit.
- Single-mode fiber lasers are typically limited to a power level of around 1-2 kW, resulting in the requirement that multiple fiber lasers be combined in order to reach multiple kW power levels; approaches to scaling the single-mode power beyond this level typically entail cost, complexity, and/or inefficiency that are undesirable for an industrial laser system.
- a single-mode system output may be desirable, and gain module 26 can be configured for single-mode output.
- a single-mode gain module 26 is typically rated at a lower output power than counterpart systems with multimode outputs.
- the modularity of the architecture of the system 20 allows a multimode gain module to be swapped with a single-mode gain module.
- a single-mode gain module can be rated for an output of 1 kW while a multi-mode gain module can be rated for an output of 3 or 4 kW.
- beam quality of the output beam 28 is generally dependent upon the maximum power rating of the gain module such that higher power ratings for gain module 26 generally correspond with a lower beam quality for output beam 28 .
- Some particular examples of gain modules 26 can be rated at a maximum power rating higher than other particular examples of gain modules 26 , and for the same output level the higher rated module will provide an output beam 28 of lower beam quality than the output beam 28 with the lower power rated module.
- a higher power rated gain module 26 configured to receive multiple pump module outputs 24 , is made possible.
- provision for receiving a plurality of pump module outputs 24 in the gain module 26 does not represent a significant beam quality compromise for system 20 configured for multiple kW power output and may provide better beam quality than a system with similar output power based on combining the outputs of single-mode fiber lasers.
- BPP beam parameter product
- a beam parameter product a standard measure of beam quality
- the BPP is generally larger (i.e., worse beam quality) at higher powers.
- an output with a higher beam quality is possible.
- a beam quality of less than about 1 mm-mrad is possible at 2 to 3 kW and less than about 2 mm-mrad is possible at 4 to 5 kW.
- Modular pump modules can be provided in a variety of selectable configurations.
- a pump module 42 is shown that includes a plurality of semiconductor diode laser modules 44 .
- Diode laser modules 44 are fiber-coupled such that the diode laser light generated in the laser module 44 is directed into an output optical fiber 46 .
- the plurality of output optical fibers 46 are combined with a fused-fiber pump combiner 48 .
- Combiners are typically made of glass and are tapered or fused to collapse multiple optical fiber inputs to fewer or one optical fiber output.
- the light coupled into the combiner 48 is combined and directed into a pump module output 50 .
- diode laser modules 44 can provide different levels of laser beam brightness or irradiance, as well as power output. Consequently, in some examples, fewer of a particular type, more of a particular type, or different types of diode laser modules 44 may be used to achieve the same desired power output of the pump module 42 .
- combiner 48 the plurality of output optical fibers 46 is combined in a single stage to provide a pump module output 50 , which can be polymer-clad or glass-clad or both, for subsequent optical coupling to a gain module (not shown).
- a pump module 43 is shown that includes a single semiconductor diode laser module 45 .
- Diode laser module 45 provides a sufficient amount of optical pumping power for coupling into a pump module output 50 without requiring the use of a pump combiner to combine multiple diode laser modules in the pump module.
- FIG. 4 another example is shown for a pump module 52 employing a plurality of diode laser modules 54 in a multi-stage combiner configuration.
- the diode modules provide fiber-coupled outputs 56 which are combined with first-stage pump fiber combiners 58 .
- the combiners 58 provide first-stage combiner outputs 60 which are then coupled in a second-stage pump combiner 62 .
- Second-stage pump combiner 62 may be the same or similar to first-stage combiner 58 depending on the brightness, power, or other requirements and characteristics of the multi-stage pump module 52 .
- the light coupled into the second-stage combiner 62 is combined and provided as a pump module output 64 , which can be polymer-clad or glass-clad or both, for subsequent optical coupling to a gain module (not shown).
- Pump module 66 includes a plurality of diode laser modules 68 providing laser pump light to respective fiber-coupled output optical fibers 70 .
- a first set of output optical fibers 72 is coupled into a first pump combiner 74 .
- the pump light is combined with the pump combiner 74 and directed to a glass-clad or polymer-clad (or both) first pump module output 76 .
- a second set of output optical fibers 78 is coupled into a second pump combiner 80 .
- the second combiner 80 combines the received pump light and directs the light to a second glass-clad or polymer-clad (or both) pump module output 82 .
- pump module 66 has more than two pump module outputs.
- pump outputs 76 , 82 include pluggable connectors 83 at a boundary of the pump module 66 .
- Connectors 83 can facilitate the modularity of the pump modules herein by allowing separate patch cables to be used to connect pump modules and gain modules or by simplifying connection between pump modules and gain modules.
- optical splices can also be used to connect outputs of pump module 66 to gain modules herein.
- Gain module 84 includes a plurality of polymer-clad, glass-clad, or both glass and polymer-clad pump inputs 86 which may be received from or may be the same as pump module outputs (not shown). As shown, pump inputs 86 are coupled into the gain module 84 via pluggable connectors 87 , though optical splices may also be used. The pump inputs 86 are optically coupled to a gain module fused pump or pump-signal combiner 88 which combines received pump light and couples the light into gain module combiner output 90 .
- the combined pump light of the combiner output 90 is coupled or spliced into a fiber laser oscillator 94 which converts incident pump power to a gain module output 96 .
- the gain module output 96 can be used as a system output or it can be combined further with an additional module.
- the fiber laser oscillator 94 generally includes an optical gain fiber 98 in which the pump light is coupled and in which the gain module output 96 is generated, a high reflector 100 configured to reflect the laser energy to produce the output 96 and to transmit incoming pump light, and a partial reflector 102 configured to transmit at least a portion of the laser energy for output 96 .
- the high and partial reflectors can be fiber Bragg gratings or other suitable reflective optical components.
- Gain module 104 includes a plurality of polymer-clad and/or glass-clad pump inputs 106 coupled to a gain module fused pump-signal or pump combiner 108 .
- the combiner 108 receives pump light through the pump inputs 106 and combines and couples the beams into a combiner output fiber portion 110 .
- the combined pump light of the combiner output 110 is coupled or spliced into a fiber laser oscillator 112 which converts a first portion of incident pump energy to signal energy for gain module output 116 .
- the fiber laser oscillator 112 can include an optical gain fiber 114 in which the pump light is coupled and in which the signal energy of the gain module output 116 is generated, a high reflector 118 configured to reflect signal energy and to transmit incoming pump energy, and a partial reflector 120 configured to transmit at least a percentage of the signal energy.
- a first amplifier 124 receives the signal light and amplifies the power thereof with pump light energy. In other embodiments, one or more additional amplifiers can be added in sequence after first amplifier 124 to vary the maximum power rating and beam quality of the gain module output 116 .
- the output fibers 146 from one or more pump modules are coupled into a gain fiber 148 using one or more pump-signal combiners 150 at one or more positions along the gain fiber 148 to provide side-pumping therein in order to produce a gain module signal output 152 .
- the one or more pump-signal combiners 150 can be used in connection with gain fiber 148 in an oscillator configuration, such as the oscillator shown in FIG. 6 , or a MOPA configuration as shown in FIG. 7 .
- the combiners 150 can be used to couple light into the gain fiber 148 at various positions, including between the high reflector and the oscillator fiber, between the oscillator and amplifier fibers, between amplification stages, or some combination thereof.
- pump light can be launched in the direction of the signal beam in a co-propagating manner, in the direction opposite the signal beam, i.e., in a counter-propagating manner, or both.
- a plurality of gain fibers 148 are disposed in the gain module in parallel so as to produce more than one gain module output 152 .
- a plurality of gain fibers can also be disposed therein in parallel so as to produce a plurality of gain module outputs.
- an oscillator 156 is bi-directionally pumped to produce a gain module output 158 .
- Pump light from one or more pump modules is launched via gain module input fibers 160 in the co-propagating direction using a combiner 158 such as a pump or pump-signal type before a high reflector 162 of the oscillator or a combiner 159 such as a pump-signal type between the high reflector 162 and the oscillator.
- pump light from one or more pump modules is launched in the counter-propagating direction using a pump-signal combiner 164 such as between the oscillator and a partial reflector 166 thereof or after the partial reflector.
- FIG. 8 there is shown an embodiment of a gain module 126 that includes a plurality of polymer-clad and/or glass-clad pump inputs 128 , a gain module combiner 130 optically coupled to the inputs 128 so as to receive the pump light therefrom, and one or more gain fiber gain stages 132 , such as oscillator and amplifier stages, coupled to the gain module combiner 130 .
- the gain stages 132 receive the pump light and are operable to generate and amplify a signal beam to be provided at an output 136 of the gain module 126 .
- an even or odd number of pump inputs 128 (in this case an even number of six inputs forming a 7 ⁇ 1 combiner) are coupled to the inputs 138 of the gain module combiner 130 .
- a central polymer-clad and/or glass-clad input 140 is coupled to the combiner input 138 .
- the central input 140 is optically coupled to an aiming laser 142 , which directs a beam through the combiner 130 , gain stages 132 , and output 136 to provide an aiming beam that can be used to indicate the direction of a beam emitted from the output 136 of the gain module; the aiming beam is typically visible to the unaided eye, such as a red or a green wavelength.
- FIGS. 11 and 12 illustrate example arrangements of pump inputs received by various gain modules and coupled to combiners therein.
- FIG. 11 shows the arrangement on the combiner depicted in FIG. 8 where an even number of six pump inputs 128 are coupled to the input 138 around a central input 140 which can be an aiming laser input or another pump input.
- FIG. 12 an arrangement of nineteen inputs 168 is shown, including a central input 170 , coupled to a combiner 172 .
- the central input 170 can be used for pumping or an aiming beam.
- the central inputs can be dedicated to signal propagation.
- unused gain module combiner inputs can be paired and conveniently spliced together in the gain module for storage and future use and splicing of additional pump modules or after removal of pump modules.
- the spliced inputs can also recirculate pump light and signal light back through the gain module, potentially increasing gain module efficiency. Through recirculation, light that should otherwise be managed and heat sunk at the termination of the unused pump input can be redirected to designed heat sinking locations, for example, via one or more cladding light strippers, where supporting thermo-mechanical systems are configured to handle and remove the heat load.
- FIG. 13 another exemplary embodiment of a gain module 180 is shown that includes a plurality of pump inputs 182 , a gain module combiner 184 optically coupled to the inputs 182 , and one or more gain stages 186 coupled to the gain module combiner 184 and which produce a gain module output 188 .
- a central polymer-clad and/or glass-clad fiber input 190 is coupled to a central location of an input 192 of the combiner.
- An aiming laser 194 is coupled to the central pump input 190 directly or with a beam-splitter 196 .
- a beam dump 198 is also coupled to the central pump input 190 and is configured to receive, monitor, and heat sink or otherwise dispose of undesirable backward-propagating light from the gain module gain fiber. For example, light reflected at a target can become back-coupled into the gain module 180 through the output 188 thereof and cause damage to the one or more gain stages 186 or other components such as upstream pump modules.
- fiber laser power levels of 1 kW or more are achievable in a scalable and modular way such that multiple kilowatt output power can be selectably obtained.
- Pump sources become separated from the gain fiber and corresponding gain stages, improving serviceability, manufacturability, and field upgradeability and to take advantage of future advances in various component technologies.
- Variable pump module populations and ease of adjusting population enhances system flexibility and upgradeability in system output power.
- a gain module 200 and a combining module 202 are shown.
- the gain module includes two or more sets of pump inputs 204 , each set coupled to a corresponding gain module combiner 206 , and each combiner coupled to a corresponding one or more gain fiber gain stages 208 .
- the separate sets of components can be configured to produce a plurality of gain module outputs 210 each with kW to multi-kW output levels.
- the separate multiple gain module outputs 210 can be used for various direct applications, or they can be coupled to combining module 202 .
- the combining module utilizes a signal combiner 212 that can be modularized to be separate from gain module 200 or the signal combiner 212 thereof can be included instead as part of the gain module 200 .
- the internal or external signal combiner 212 can be used to combine the various single-mode or multimode outputs 210 from the gain module 200 to produce a combined fiber output 214 capable of providing a very high power output beam in the multiple kW regime. For example, average power outputs of 4 kW, 6 kW, 8 kW, 10 kW, 12 kW or even higher can be achieved.
- separate gain modules can provide single gain module outputs that can be combined in combining stage 202 internal or external to gain module 200 .
- a gain module 220 is shown that includes a pair of gain fibers 222 end-pumped by a plurality of pump inputs 224 coupled to the respective gain fibers 222 with combiners 226 .
- High-power multimode or single-mode gain fiber outputs 228 are coupled into a signal combiner 230 that combines the high-power gain fiber outputs 228 into a single high-power output 232 of the gain module 220 .
- gain fiber outputs provides optical powers of 4 kW respectively that are combined with the signal combiner 230 to provide a gain module output of about 8 kW.
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Abstract
Description
- This application is a continuation of U.S. patent application Ser. No. 15/912,034, filed Mar. 5, 2018, which is a continuation of U.S. patent application Ser. No. 14/293,941, filed Jun. 2, 2014, now U.S. Pat. No. 10,069,271, both of which are incorporated by reference herein in their entirety.
- Generally, the field of the present invention is high power fiber lasers. More particularly, the present invention relates to scalable high power continuous-wave and quasi-continuous-wave fiber lasers.
- Conventional multi-kilowatt industrial fiber laser systems typically employ a non-scalable architecture consisting of multiple component fiber lasers whose outputs are combined with a fused-fiber signal combiner. The total fiber laser system output power is typically in the range of 2 to 6 kW, and the individual component fiber lasers typically have a power in the range of 0.4 to 1.0 kW. Thus, in order to reach total powers in excess of 1 kW, the outputs from multiple fiber lasers (typically two to ten) must be combined.
- Such conventional approaches for achieving a high power fiber laser output have several drawbacks made apparent in light of the present disclosure. For example, by combining the multiple individual fiber laser systems significant redundancy is required in optical, electrical, and mechanical components, thereby increasing the system cost, size, and complexity. In addition, fiber laser component systems generally have limited field serviceability, often requiring replacement of the entire fiber laser component system if an optical component thereof fails. Such entire replacement occurs even when the optical component failure is localized to only a portion of the fiber component system, such as a broken fiber. Requiring the replacement of entire fiber laser component systems increases cost for repair of the complete multi-kilowatt system. Field replacement of a fiber laser component system typically requires highly specialized equipment and clean-room conditions, which are not readily available in factory environments, making service costly and disruptive.
- The fused-fiber signal combiner causes optical loss and diminishes the beam quality of the individual fiber laser outputs received. This loss negatively impacts efficiency, which determines power consumption and waste-heat generation, and beam quality degradation can reduce the speed in metal-cutting applications. Furthermore, the signal combiner is expensive, requiring costly equipment and considerable process development and control for fabrication, and it can experience unpredictable variation impacting reproducibility and reliability. Fused-fiber signal combiners are also subject to operational damage, including from optical feedback from the work piece, thereby decreasing system reliability.
- Utilizing a signal combiner to achieve up to a few kilowatts of power also limits the ability for laser power of the fiber laser system to be upgraded in the field. For example, a fused signal combiner may include empty ports for receiving additional component fiber lasers. However, the beam quality of output beam is degraded whether or not the extra ports are populated with additional component fiber laser system outputs. Also, if the signal combiner has fully populated input ports, upgrading system output power requires the replacement of one or more of the component fiber lasers with a component fiber laser of higher power. Replacing component fiber lasers is expensive, particularly since there is attendant with it limited or no re-use of the replaced component fiber laser, subsystems, or components.
- Conventional system designs are also limited with respect to how technological advances can be accommodated or incorporated since many key components are integrated into each component fiber laser. For example, pump diode technology is advancing rapidly, providing increased power, brightness, and efficiency and reduced cost. Active fibers have also experienced significant technological gains in recent years. Incorporating these advances into an existing fiber laser can be difficult or impossible if the pump diodes, fibers, and electronics are all integrated into a single laser module. For example, the interconnections among components within a single laser module would likely be inaccessible or not easily changeable, and changes to critical components would entail significant design ripple, requiring corresponding changes in the other components. Similarly, the mechanical or thermal designs could be impacted by changing a critical component. Thus, conventional high power fiber laser architectures often must either forgo upgrades based on technological advances or commit to costly and time consuming redesign.
- A need therefore exists for a multi-kilowatt fiber laser architecture that minimizes cost by eliminating component redundancy, minimizes or eliminates the drawbacks of signal combiners, is easily and cost-effectively serviceable in the field, enables field upgradability, and is sufficiently flexible to accommodate technological advances without significant cost or design ripple.
- According to one aspect of the present invention, a modular and scalable high power fiber laser system configurable to generate 1 kW or more of laser output includes one or more separable pump modules separately disposed from each other, each pump module including a plurality of fiber-coupled component pump sources optically combined by one or more fiber-based pump module pump combiners, each pump module providing one or more pump module fiber outputs, and a gain module separately disposed from the one or more separable pump modules and including one or more gain module pump fiber inputs optically coupled to corresponding ones of the pump module fiber outputs, and including a gain fiber optically coupled to the one or more gain module pump fiber inputs, the gain fiber configured to generate a gain module fiber output power scalable in relation to the number and power of the pump module fiber outputs coupled to the gain fiber.
- According to another aspect of the present invention, a high-power fiber laser system includes a gain module configured to generate an output beam of 1 kW or greater at an output beam wavelength, and one or more pump modules optically coupled to the gain module and configured to generate light at a pump wavelength for optically pumping the gain module, wherein the gain module is configured to receive pump light from the one or more pump modules such that the power of the output beam is scalable in accordance with the number and power of pump modules coupled to the gain module.
- The foregoing and other objects, features, and advantages will become apparent from the following detailed description, which proceeds with reference to the accompanying figures which are not necessarily to scale.
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FIG. 1A is a perspective view of a fiber laser system in accordance with an aspect of the present invention. -
FIG. 1B is a connectivity diagram of the fiber laser system depicted inFIG. 1A in accordance with an aspect of the present invention. -
FIG. 2 is a plan view schematic of a fiber laser system in accordance with an aspect of the present invention. -
FIG. 3A is a schematic of a pump module of a fiber laser system in accordance with an aspect of the present invention. -
FIG. 3B is a schematic of a pump module of a fiber laser system in accordance with an aspect of the present invention. -
FIG. 4 is a schematic of another pump module of a fiber laser system in accordance with an aspect of the present invention. -
FIG. 5 is a schematic of another pump module of a fiber laser system in accordance with an aspect of the present invention. -
FIG. 6 is a schematic of a gain module of a fiber laser system in accordance with an aspect of the present invention. -
FIG. 7 is a schematic of another gain module of a fiber laser system in accordance with an aspect of the present invention. -
FIG. 8 is a schematic of another gain module of a fiber laser system in accordance with an aspect of the present invention. -
FIG. 9 is a schematic of another gain module of a fiber laser system in accordance with an aspect of the present invention. -
FIG. 10 is a schematic of another gain module of a fiber laser system in accordance with an aspect of the present invention. -
FIG. 11 is a rear view of a gain module combiner of a fiber laser system in accordance with an aspect of the present invention. -
FIG. 12 is a rear view of another gain module combiner of a fiber laser system in accordance with an aspect of the present invention. -
FIG. 13 is a schematic of another gain module of a fiber laser system in accordance with an aspect of the present invention. -
FIG. 14 is a schematic of a combiner stage in accordance with an aspect of the present invention. -
FIG. 15 is a schematic of another gain module of a fiber laser system in accordance with an aspect of the present invention. - A perspective view of a first embodiment of a highly configurable, modular, and scalable continuous-wave or quasi-continuous-wave high-power
fiber laser system 1000 is shown inFIG. 1A . Thefiber laser system 1000 includesseveral bays 1001 which modularly receive different system modules, includingsystem pump modules 1002 andsystem gain modules 1003, each which can be configured to be separable from thefiber laser system 1000. Additional modules, such as acontrol module 1004 or a power supply module, also can be modularly disposed in relation to the other system modules of thesystem 1000. The scalable multi-kilowattfiber laser system 1000 is depicted in an optional mobile configuration, with a plurality of system modules disposed in a vertical rack arrangement mounted atop a plurality ofcasters 1005 for convenient movement in an industrial environment.Pump modules 1002 provide one or more pumpmodule fiber outputs 1006 which are optically coupled to one ormore gain modules 1003.Fiber laser system 1000 includes asystem output 1007 providing about 1 kW or more of output power for various industrial applications and which can be provided by the one ormore gain modules 1003. Output power of the system can be scaled by addingadditional pump modules 1002 inavailable system bays 1001 or by upgrading installedpump modules 1002 by swapping old with new. - The modularity and scalability of embodiments herein present numerous manufacturing advantages. For example, many different power levels can be selected without requiring significant redesign between the selected power level configurations. A configuration with a
single pump module 1002 and asingle gain module 1003 can provide a particular system output power which can be upgraded by installing an additional pump module 1002 (seepump module 1002 shown in dashed lines inFIG. 1 ) and splicing thepump module output 1006 to thegain module 1003. Due to the modularity, size and weight can be divided between pump and gain modules such that a single person in the field or factory can carry, implement, or service each pump and gain module of the system. This advantage can be particularly significant as the power from a single fiber laser is increased, which has been a consistent trend in the industry; this power scaling trend can continue without resulting in prohibitively large or heavy modules because the pump modules and gain modules do not have to be housed in a single module. The form factor of the laser system can also be configured to support different deployment scenarios. For example, system modules can be mounted in a rack vertically as shown inFIG. 1 , horizontally, or in another orientation, or combination thereof. Modules can be physically separated from each other to facilitate integration into a desired space. - In
FIG. 1B a schematic is shown for an embodiment of asystem 1010 similar to that shown in perspective view inFIG. 1A . Thesystem 1010 includes a plurality ofpump modules 1011 providing pump energy to again module 1012 which is configured to generate alaser system output 1013. Thesystem 1010 can include one ormore expansion slots 1014 to provide configuration changes to thesystem 1010, such as additional pump or gain modules. Acooling system 1015 is coupled to the pump and gain modules to provide thermal stability therein and to thesystem 1010 as a whole. Thesystem 1010 is controlled by acontroller 1015 configured to monitor and adjust outputs and other properties of the pump modules, gain modules and cooling system. - Referring now to
FIG. 2 , an embodiment of a high powerfiber laser system 20 is shown, in accordance with another aspect of the present invention. Thefiber laser system 20 is highly configurable and modular such that thesystem 20 can be manufactured ab initio for operation at a pre-selected range of output powers, such as between 1 kW or less and multiple KWs, and for upgrade to higher output powers or different performance criteria. Thefiber laser system 20 includes one or morecomponent pump modules 22 each separately disposed from the other and modularly separable from thesystem 20. Eachcomponent pump module 22 provides one or more component pump module outputs 24. Thefiber laser system 20 also includes one ormore gain modules 26 separately disposed from each other and modularly separable from thesystem 20. The one ormore gain modules 26 are optically coupled to the one or more component pump module outputs 24, such that a fiber lasersystem output beam 28 is produced at a predetermined output power. In the example shown inFIG. 2 , asingle gain module 26 provides thesystem output beam 28 by utilizing the pump power of threepump modules 22 coupled to thegain module 26. Slots for additional modularlyseparable pump modules 22 are shown withspots 23 while corresponding additional pump module outputs for coupling to thegain module 26 are shown with dashedlines 27. -
Gain module 26 includes a gain fiber incorporated into alaser oscillator 30 providing laser oscillation between oppositefiber Bragg gratings 31. In some examples, the gain fiber of thegain module 26 includes optical fiber sized to accommodate a predetermined highest output power for thefiber laser system 20. For example, in some embodiments selected maximum operating output powers are in the kW range, such as 1 kW, 2 kW, 3 kW, 4 kW, 5 kW, or higher. The maximum output power of thefiber laser system 20 is determined by the number and output power ofpump modules 22 capable of being spliced to thegain module 26. Thus, the fiberlaser output beam 28 can be produced without using a plurality of redundant oscillator or amplifier systems, without redundant supporting mechanical and electrical components, and without using a signal combiner to combine a plurality of redundant component fiber laser outputs. - The separate and modular nature of the pump and gain
modules gain module 26, thegain module 26 can be replaced while each of the installed pump modules remains intact without any or substantial modification. Similarly, if apump module 22 fails in some fashion, thepump module 22 can be replaced, leaving eachother pump module 22 and thegain module 26 in place without any or substantial modification thereof. Systems herein provide robustness advantages as potential failures are more likely to be isolated to particular system modules, which can be interchanged and upgraded without replacing an entire system. - In preferred examples, a
pump module 22 includes one or more semiconductordiode laser modules 34 each including one or more semiconductor diode lasers providing one or more diode laser output beams combined and coupled to a diode laser module outputoptical fiber 36. A plurality of outputoptical fibers 36 are optically coupled to a pumpmodule pump combiner 38 to combine the diode laser module pump light into apump module output 24. Pumpmodule pump combiners 38 are configured to transmit low-brightness multimode pump light in a large core, as opposed to signal combiners, which transmit high-brightness signal light in a small core. Pump combiners are often manufactured at less cost than signal combiners since the performance requirements, such as beam quality at the combiner output and optical insertion loss, are typically less demanding. - Combined pump light is coupled out of the
pump module 22 through one or more pump module outputs 24. The pump module outputs 24 are optically coupled (e.g., by fiber splicing) to thegain module 26 onto afiber combiner 40 thereof. Thefiber combiner 40 can be the similar in design to the pumpmodule pump combiner 38 associated with eachpump module 22. However, in preferred examples, the combiner in the gain module can be a pump-signal combiner, which transmits both signal and pump light. As will be described further hereinafter, pump-signal combiners can be used at a back end of the gain module gain fiber, at a front end of the gain fiber to launch counter-propagating pump light, within or between gain stages (e.g., between an oscillator and an amplifier or between amplifiers), or some combination thereof. In various examples herein, since the performance requirements of the fiber splices between the pump and gain modules are often lower than those for splices that must transmit signal light (e.g., between a component fiber laser and a signal combiner in conventional designs), splicing requirements are relaxed concomitantly, allowing for in situ splicing of the pump module outputs 24 to selected gain module inputs of thefiber combiner 40 under less than clean-room conditions using commercially available equipment. Alignment sensitivity and cleave-angle requirements are lower forsplicing outputs 24 tofiber combiner 40 as compared to the splicing of fibers to signal combiners, also contributing to the accessibility of splicing fibers to thefiber combiner 40 in a factory or other field environment. For glass-clad fibers, splicing of the pump module outputs 24 to thefiber combiner 40 is insensitive to contamination and consequently suitable for use in field and factory environments. In some examples, pump module outputs 24 are coupled to gainmodule 26 via connectors pluggable into the pump module or the gain module or both, eliminating the need for splicing and further enhancing modularity of the fiber laser system. - In addition to enhancing the field serviceability of the
fiber laser system 20, the modular separation of the pump modules and gain module allows for field upgradability of thesystem 20 to higher allowable output powers. For example,additional pump modules 22 can be spliced to open pump fiber inputs of thefiber combiner 40 of the gain module.Additional pump modules 22 can be identical to or different from existingmodules 22 spliced to thegain module 26 such thatlaser output 28 of thesystem 20 can be selectably scaled to higher powers. Similar to servicing an existingsystem 20, the procedure for splicing the pump module outputs 24 of theadditional pump modules 22 to the fiber inputs of thefiber combiner 40 is relatively simple and can be performed in a factory or other field environment. The modular separation between pump modules and gain module also allows for scalable power output of thesystem 20 because the physical separation between pump modules and between the gain module and pump modules reduces or eliminates thermal crosstalk between modules. Each module can be provided with independent water-cooling ports such that modules can be cooled separately or cooled together in parallel or in series. In one example high power fiber laser system built in accordance with aspects of the present invention a 3 kW fiber laser output power can be generated with three 1.5 kW pump modules being spliced to the gain module. In another example, building or upgrading the fiber laser system to have three 2.0 kW pump modules can provide a 4 kW fiber laser output power. In some examples, one or more backup pump modules can be provided in thefiber laser system 20 for use in the event of the failure of another pump module. Thesystem 20 can be configured to switch over to the backup pump modules immediately upon failure, or slowly as one or more other active pump modules degrade over a period of time. The separable nature of the pump modules further allows for failed modules to be replaced in situ with new pump modules without affecting the operation of the backup pump modules or fiber laser system. - In addition to field serviceability and field power expandability, the modularity of
system 20 provides for adaptability to various technology improvements, ensuring compatibility of thesystem 20 and its existing modules with the pace of innovation in the laser industry. For example, improvements in pump diode technology could provide for an upgradedpump module 22. The upgraded pump module can be substituted for an existingpump module 22 or can be used in addition to existingpump modules 22, providing improved system performance, efficiency, cost, or any combination thereof, without requiring significant design changes or replacement of components that have not been upgraded. Similarly, improvements in gain module technology such as oscillator or amplifier architecture might provide for an upgradedgain module 26. The upgraded gain module can be substituted for the existinggain module 26 without requiring replacement or modification of the pump modules. The various substitutions can again be performed in the field or factory environment. - In many industrial applications for kW fiber lasers, single-mode output beam quality is not required. Accordingly, conventional architectures typically combine the outputs of fiber lasers producing single-mode signal beams using a signal combiner to produce a multimode output beam. In some examples of
fiber laser system 20, thegain module 26 does not produce single-mode output since such output is not required for many applications. Because the desired output is multimode,systems 20 can achieve such output without the need for the complexity of single-mode combination. Also, because single-mode operation of thegain module 26 is not required, the ability to scale the power of thegain module 26 to multiple kW outputs is more accessible. Allowing the gain fiber of thegain module 26 to be multimode facilitates power scaling in a more practical manner than by maximizing the single-mode output power of an individual fiber laser since the single-mode power limit is lower than the multimode power limit. Single-mode fiber lasers are typically limited to a power level of around 1-2 kW, resulting in the requirement that multiple fiber lasers be combined in order to reach multiple kW power levels; approaches to scaling the single-mode power beyond this level typically entail cost, complexity, and/or inefficiency that are undesirable for an industrial laser system. - In other embodiments, a single-mode system output may be desirable, and gain
module 26 can be configured for single-mode output. A single-mode gain module 26 is typically rated at a lower output power than counterpart systems with multimode outputs. However, the modularity of the architecture of thesystem 20 allows a multimode gain module to be swapped with a single-mode gain module. In one example, a single-mode gain module can be rated for an output of 1 kW while a multi-mode gain module can be rated for an output of 3 or 4 kW. - In typical examples of
gain module 26, beam quality of theoutput beam 28 is generally dependent upon the maximum power rating of the gain module such that higher power ratings forgain module 26 generally correspond with a lower beam quality foroutput beam 28. Some particular examples ofgain modules 26 can be rated at a maximum power rating higher than other particular examples ofgain modules 26, and for the same output level the higher rated module will provide anoutput beam 28 of lower beam quality than theoutput beam 28 with the lower power rated module. However, in fiber laser system examples herein that do not utilize fused signal combiners such that undesirable beam quality degradation in theoutput beam 28 is correspondingly avoided, a higher power ratedgain module 26, configured to receive multiple pump module outputs 24, is made possible. Thus, provision for receiving a plurality of pump module outputs 24 in thegain module 26 does not represent a significant beam quality compromise forsystem 20 configured for multiple kW power output and may provide better beam quality than a system with similar output power based on combining the outputs of single-mode fiber lasers. - Conventional kW fiber laser systems for industrial materials processing applications typically provide a beam parameter product (BPP, a standard measure of beam quality) of 2.3-3.0 mm-mrad at a power level of 2-4 kW, and the BPP is generally larger (i.e., worse beam quality) at higher powers. By eliminating the signal combiner according to various aspects of the present invention, an output with a higher beam quality is possible. For example, with presently available pump diodes, a beam quality of less than about 1 mm-mrad is possible at 2 to 3 kW and less than about 2 mm-mrad is possible at 4 to 5 kW.
- Modular pump modules can be provided in a variety of selectable configurations. With reference to
FIG. 3A , apump module 42 is shown that includes a plurality of semiconductordiode laser modules 44.Diode laser modules 44 are fiber-coupled such that the diode laser light generated in thelaser module 44 is directed into an outputoptical fiber 46. The plurality of outputoptical fibers 46 are combined with a fused-fiber pump combiner 48. Combiners are typically made of glass and are tapered or fused to collapse multiple optical fiber inputs to fewer or one optical fiber output. The light coupled into thecombiner 48 is combined and directed into apump module output 50. Different types ofdiode laser modules 44 may be used, which can provide different levels of laser beam brightness or irradiance, as well as power output. Consequently, in some examples, fewer of a particular type, more of a particular type, or different types ofdiode laser modules 44 may be used to achieve the same desired power output of thepump module 42. Withcombiner 48 the plurality of outputoptical fibers 46 is combined in a single stage to provide apump module output 50, which can be polymer-clad or glass-clad or both, for subsequent optical coupling to a gain module (not shown). InFIG. 3B , apump module 43 is shown that includes a single semiconductordiode laser module 45.Diode laser module 45 provides a sufficient amount of optical pumping power for coupling into apump module output 50 without requiring the use of a pump combiner to combine multiple diode laser modules in the pump module. - Referring to
FIG. 4 , another example is shown for apump module 52 employing a plurality ofdiode laser modules 54 in a multi-stage combiner configuration. The diode modules provide fiber-coupledoutputs 56 which are combined with first-stagepump fiber combiners 58. Thecombiners 58 provide first-stage combiner outputs 60 which are then coupled in a second-stage pump combiner 62. Second-stage pump combiner 62 may be the same or similar to first-stage combiner 58 depending on the brightness, power, or other requirements and characteristics of themulti-stage pump module 52. The light coupled into the second-stage combiner 62 is combined and provided as apump module output 64, which can be polymer-clad or glass-clad or both, for subsequent optical coupling to a gain module (not shown). - In
FIG. 5 another embodiment of apump module 66 is shown providing a plurality of pump module outputs.Pump module 66 includes a plurality ofdiode laser modules 68 providing laser pump light to respective fiber-coupled outputoptical fibers 70. A first set of outputoptical fibers 72 is coupled into afirst pump combiner 74. The pump light is combined with thepump combiner 74 and directed to a glass-clad or polymer-clad (or both) firstpump module output 76. A second set of outputoptical fibers 78 is coupled into asecond pump combiner 80. Thesecond combiner 80 combines the received pump light and directs the light to a second glass-clad or polymer-clad (or both)pump module output 82. In other embodiments,pump module 66 has more than two pump module outputs. As shown, pump outputs 76, 82 includepluggable connectors 83 at a boundary of thepump module 66.Connectors 83 can facilitate the modularity of the pump modules herein by allowing separate patch cables to be used to connect pump modules and gain modules or by simplifying connection between pump modules and gain modules. However, optical splices can also be used to connect outputs ofpump module 66 to gain modules herein. - In
FIG. 6 an alternative embodiment of again module 84 is shown.Gain module 84 includes a plurality of polymer-clad, glass-clad, or both glass and polymer-cladpump inputs 86 which may be received from or may be the same as pump module outputs (not shown). As shown,pump inputs 86 are coupled into thegain module 84 viapluggable connectors 87, though optical splices may also be used. Thepump inputs 86 are optically coupled to a gain module fused pump or pump-signal combiner 88 which combines received pump light and couples the light into gainmodule combiner output 90. The combined pump light of thecombiner output 90 is coupled or spliced into afiber laser oscillator 94 which converts incident pump power to again module output 96. Thegain module output 96 can be used as a system output or it can be combined further with an additional module. Thefiber laser oscillator 94 generally includes anoptical gain fiber 98 in which the pump light is coupled and in which thegain module output 96 is generated, ahigh reflector 100 configured to reflect the laser energy to produce theoutput 96 and to transmit incoming pump light, and apartial reflector 102 configured to transmit at least a portion of the laser energy foroutput 96. The high and partial reflectors can be fiber Bragg gratings or other suitable reflective optical components. - In
FIG. 7 another alternative embodiment of again module 104 is shown for a master oscillator power amplifier (MOPA) configuration.Gain module 104 includes a plurality of polymer-clad and/or glass-cladpump inputs 106 coupled to a gain module fused pump-signal orpump combiner 108. Thecombiner 108 receives pump light through thepump inputs 106 and combines and couples the beams into a combineroutput fiber portion 110. The combined pump light of thecombiner output 110 is coupled or spliced into afiber laser oscillator 112 which converts a first portion of incident pump energy to signal energy forgain module output 116. Thefiber laser oscillator 112 can include anoptical gain fiber 114 in which the pump light is coupled and in which the signal energy of thegain module output 116 is generated, ahigh reflector 118 configured to reflect signal energy and to transmit incoming pump energy, and apartial reflector 120 configured to transmit at least a percentage of the signal energy. Afirst amplifier 124 receives the signal light and amplifies the power thereof with pump light energy. In other embodiments, one or more additional amplifiers can be added in sequence afterfirst amplifier 124 to vary the maximum power rating and beam quality of thegain module output 116. - In another embodiment of a gain module 144, shown in
FIG. 9 , theoutput fibers 146 from one or more pump modules are coupled into again fiber 148 using one or more pump-signal combiners 150 at one or more positions along thegain fiber 148 to provide side-pumping therein in order to produce a gainmodule signal output 152. The one or more pump-signal combiners 150 can be used in connection withgain fiber 148 in an oscillator configuration, such as the oscillator shown inFIG. 6 , or a MOPA configuration as shown inFIG. 7 . Thecombiners 150 can be used to couple light into thegain fiber 148 at various positions, including between the high reflector and the oscillator fiber, between the oscillator and amplifier fibers, between amplification stages, or some combination thereof. Moreover, pump light can be launched in the direction of the signal beam in a co-propagating manner, in the direction opposite the signal beam, i.e., in a counter-propagating manner, or both. In some examples providing side-pumping, a plurality ofgain fibers 148 are disposed in the gain module in parallel so as to produce more than onegain module output 152. Similarly, it will be appreciated that for other various gain module embodiments herein a plurality of gain fibers can also be disposed therein in parallel so as to produce a plurality of gain module outputs. - In another embodiment of a
gain module 154, shown inFIG. 10 , anoscillator 156 is bi-directionally pumped to produce again module output 158. Pump light from one or more pump modules is launched via gainmodule input fibers 160 in the co-propagating direction using acombiner 158 such as a pump or pump-signal type before ahigh reflector 162 of the oscillator or acombiner 159 such as a pump-signal type between thehigh reflector 162 and the oscillator. In addition, pump light from one or more pump modules is launched in the counter-propagating direction using a pump-signal combiner 164 such as between the oscillator and a partial reflector 166 thereof or after the partial reflector. - In
FIG. 8 there is shown an embodiment of again module 126 that includes a plurality of polymer-clad and/or glass-cladpump inputs 128, again module combiner 130 optically coupled to theinputs 128 so as to receive the pump light therefrom, and one or more gain fiber gain stages 132, such as oscillator and amplifier stages, coupled to thegain module combiner 130. The gain stages 132 receive the pump light and are operable to generate and amplify a signal beam to be provided at anoutput 136 of thegain module 126. As shown, an even or odd number of pump inputs 128 (in this case an even number of six inputs forming a 7×1 combiner) are coupled to theinputs 138 of thegain module combiner 130. A central polymer-clad and/or glass-cladinput 140 is coupled to thecombiner input 138. Thecentral input 140 is optically coupled to an aiming laser 142, which directs a beam through thecombiner 130, gain stages 132, andoutput 136 to provide an aiming beam that can be used to indicate the direction of a beam emitted from theoutput 136 of the gain module; the aiming beam is typically visible to the unaided eye, such as a red or a green wavelength. -
FIGS. 11 and 12 illustrate example arrangements of pump inputs received by various gain modules and coupled to combiners therein.FIG. 11 shows the arrangement on the combiner depicted inFIG. 8 where an even number of sixpump inputs 128 are coupled to theinput 138 around acentral input 140 which can be an aiming laser input or another pump input. InFIG. 12 an arrangement of nineteeninputs 168 is shown, including acentral input 170, coupled to acombiner 172. Thecentral input 170 can be used for pumping or an aiming beam. In other examples, such as pump-signal combiner examples described herein, the central inputs can be dedicated to signal propagation. In various combiner examples herein, unused gain module combiner inputs can be paired and conveniently spliced together in the gain module for storage and future use and splicing of additional pump modules or after removal of pump modules. The spliced inputs can also recirculate pump light and signal light back through the gain module, potentially increasing gain module efficiency. Through recirculation, light that should otherwise be managed and heat sunk at the termination of the unused pump input can be redirected to designed heat sinking locations, for example, via one or more cladding light strippers, where supporting thermo-mechanical systems are configured to handle and remove the heat load. - In
FIG. 13 another exemplary embodiment of again module 180 is shown that includes a plurality ofpump inputs 182, again module combiner 184 optically coupled to theinputs 182, and one or more gain stages 186 coupled to thegain module combiner 184 and which produce again module output 188. A central polymer-clad and/or glass-cladfiber input 190 is coupled to a central location of aninput 192 of the combiner. An aiminglaser 194 is coupled to thecentral pump input 190 directly or with a beam-splitter 196. Abeam dump 198 is also coupled to thecentral pump input 190 and is configured to receive, monitor, and heat sink or otherwise dispose of undesirable backward-propagating light from the gain module gain fiber. For example, light reflected at a target can become back-coupled into thegain module 180 through theoutput 188 thereof and cause damage to the one or more gain stages 186 or other components such as upstream pump modules. - Thus, it will be appreciated that some examples herein provide particular advantages over conventional approaches to configuring high power continuous-wave or quasi-continuous-wave fiber lasers in industrial settings. Herein, fiber laser power levels of 1 kW or more are achievable in a scalable and modular way such that multiple kilowatt output power can be selectably obtained. Pump sources become separated from the gain fiber and corresponding gain stages, improving serviceability, manufacturability, and field upgradeability and to take advantage of future advances in various component technologies. Variable pump module populations and ease of adjusting population enhances system flexibility and upgradeability in system output power.
- In further examples, with reference
FIG. 14 , again module 200 and a combiningmodule 202 are shown. The gain module includes two or more sets ofpump inputs 204, each set coupled to a correspondinggain module combiner 206, and each combiner coupled to a corresponding one or more gain fiber gain stages 208. The separate sets of components can be configured to produce a plurality ofgain module outputs 210 each with kW to multi-kW output levels. The separate multiplegain module outputs 210 can be used for various direct applications, or they can be coupled to combiningmodule 202. The combining module utilizes asignal combiner 212 that can be modularized to be separate fromgain module 200 or thesignal combiner 212 thereof can be included instead as part of thegain module 200. The internal orexternal signal combiner 212 can be used to combine the various single-mode ormultimode outputs 210 from thegain module 200 to produce a combinedfiber output 214 capable of providing a very high power output beam in the multiple kW regime. For example, average power outputs of 4 kW, 6 kW, 8 kW, 10 kW, 12 kW or even higher can be achieved. In additional examples, separate gain modules can provide single gain module outputs that can be combined in combiningstage 202 internal or external to gainmodule 200. - In further examples, with reference to
FIG. 15 , again module 220 is shown that includes a pair ofgain fibers 222 end-pumped by a plurality ofpump inputs 224 coupled to therespective gain fibers 222 withcombiners 226. High-power multimode or single-modegain fiber outputs 228 are coupled into asignal combiner 230 that combines the high-powergain fiber outputs 228 into a single high-power output 232 of thegain module 220. In one example, gain fiber outputs provides optical powers of 4 kW respectively that are combined with thesignal combiner 230 to provide a gain module output of about 8 kW. It will be appreciated that various output powers or ranges of output powers can be provided forgain module 220 by varying the number and type of scalable pump modules and pump inputs thereof coupled to thegain module 220 and also by varying the architecture of the gain module in accordance with the various embodiments and teachings herein. It is thought that the present invention and many of the attendant advantages thereof will be understood from the foregoing description, and it will be apparent that various changes may be made in the parts thereof without departing from the spirit and scope of the invention or sacrificing all of its material advantages, the forms hereinbefore described being merely exemplary embodiments thereof.
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Families Citing this family (43)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10069271B2 (en) | 2014-06-02 | 2018-09-04 | Nlight, Inc. | Scalable high power fiber laser |
US10618131B2 (en) | 2014-06-05 | 2020-04-14 | Nlight, Inc. | Laser patterning skew correction |
JP2017528922A (en) * | 2014-07-03 | 2017-09-28 | アイピージー フォトニクス コーポレーション | Method and system for uniformly crystallizing an amorphous silicon substrate with a fiber laser |
US10310201B2 (en) | 2014-08-01 | 2019-06-04 | Nlight, Inc. | Back-reflection protection and monitoring in fiber and fiber-delivered lasers |
JP5834125B1 (en) * | 2014-09-29 | 2015-12-16 | 株式会社フジクラ | Optical fiber module |
US9837783B2 (en) | 2015-01-26 | 2017-12-05 | Nlight, Inc. | High-power, single-mode fiber sources |
US10050404B2 (en) | 2015-03-26 | 2018-08-14 | Nlight, Inc. | Fiber source with cascaded gain stages and/or multimode delivery fiber with low splice loss |
US10761276B2 (en) | 2015-05-15 | 2020-09-01 | Nlight, Inc. | Passively aligned crossed-cylinder objective assembly |
CN107924023B (en) | 2015-07-08 | 2020-12-01 | 恩耐公司 | Fibers having suppressed center refractive index for increased beam parameter product |
CN108369315B (en) | 2015-09-24 | 2020-08-04 | 恩耐公司 | Apparatus and method for controlling beam parameter product |
US11179807B2 (en) | 2015-11-23 | 2021-11-23 | Nlight, Inc. | Fine-scale temporal control for laser material processing |
US10434600B2 (en) | 2015-11-23 | 2019-10-08 | Nlight, Inc. | Fine-scale temporal control for laser material processing |
CN108885349A (en) | 2016-02-16 | 2018-11-23 | 恩耐公司 | For improving the unimodule telescope of the packaging passive alignment of package brightness |
EP3430692B1 (en) | 2016-03-18 | 2022-05-25 | NLIGHT, Inc. | Spectrally multiplexing diode pump modules to improve brightness |
CN107293930B (en) * | 2016-04-01 | 2020-01-14 | 中国兵器装备研究院 | Integrated high-power all-fiber laser |
CN109792133A (en) * | 2016-08-26 | 2019-05-21 | 恩耐公司 | Optical fiber combination machine with input port collector |
US11027366B2 (en) | 2016-08-26 | 2021-06-08 | Nlight, Inc. | Laser power distribution module |
US10261329B2 (en) | 2016-08-26 | 2019-04-16 | Nlight, Inc. | Fiber combiner with input port dump |
CN106299982B (en) * | 2016-09-20 | 2022-05-20 | 光惠(上海)激光科技有限公司 | Expandable double-sided efficient fiber laser cooling system |
US10732439B2 (en) | 2016-09-29 | 2020-08-04 | Nlight, Inc. | Fiber-coupled device for varying beam characteristics |
US10730785B2 (en) | 2016-09-29 | 2020-08-04 | Nlight, Inc. | Optical fiber bending mechanisms |
CN109791252B (en) | 2016-09-29 | 2021-06-29 | 恩耐公司 | Adjustable beam characteristics |
US10673199B2 (en) | 2016-09-29 | 2020-06-02 | Nlight, Inc. | Fiber-based saturable absorber |
US10673197B2 (en) | 2016-09-29 | 2020-06-02 | Nlight, Inc. | Fiber-based optical modulator |
US10673198B2 (en) | 2016-09-29 | 2020-06-02 | Nlight, Inc. | Fiber-coupled laser with time varying beam characteristics |
JP6844993B2 (en) * | 2016-11-25 | 2021-03-17 | 古河電気工業株式会社 | Laser device and light source device |
JP6814887B2 (en) | 2016-12-23 | 2021-01-20 | エヌライト,インコーポレーテッド | Low cost optical pump laser package |
CN110651218B (en) | 2017-04-04 | 2022-03-01 | 恩耐公司 | Apparatus, system and method for calibration of galvanometer scanners |
US10763640B2 (en) * | 2017-04-24 | 2020-09-01 | Nlight, Inc. | Low swap two-phase cooled diode laser package |
US10003168B1 (en) * | 2017-10-18 | 2018-06-19 | Luminar Technologies, Inc. | Fiber laser with free-space components |
US10998689B2 (en) * | 2018-01-19 | 2021-05-04 | Shailendhar Saraf | Systems, apparatus, and methods for producing ultra stable, single-frequency, single-transverse-mode coherent light in solid-state lasers |
EP3750218A4 (en) | 2018-02-06 | 2021-11-03 | Nlight, Inc. | Diode laser apparatus with fac lens out-of-plane beam steering |
US11158990B2 (en) * | 2018-03-13 | 2021-10-26 | Nufern | Optical fiber amplifier system and methods of using same |
CN108879303B (en) * | 2018-07-20 | 2023-11-14 | 中国人民解放军国防科技大学 | All-fiber oscillator based on all-reflection and partial-reflection bidirectional fiber end caps |
EP3639730A1 (en) * | 2018-10-16 | 2020-04-22 | Koninklijke Philips N.V. | Supply of a sensor of an interventional device |
JP6826089B2 (en) * | 2018-10-30 | 2021-02-03 | ファナック株式会社 | Manufacturing method of optical fiber for fiber laser, fiber laser and optical fiber for fiber laser |
US20200295521A1 (en) * | 2019-03-11 | 2020-09-17 | Vescent Photonics LLC | All Polarization-Maintaining, Passively Mode-Locked Linear Fiber Laser Oscillator |
US11876337B2 (en) | 2019-10-25 | 2024-01-16 | Clemson University | Three-level system fiber lasers incorporating an all-solid photonic bandgap fiber |
US20210305763A1 (en) * | 2020-03-24 | 2021-09-30 | David Stucker | Composite fiber laser assembly |
WO2022140930A1 (en) * | 2020-12-28 | 2022-07-07 | 北京凯普林光电科技股份有限公司 | Semiconductor fiber laser assembly and fiber laser |
CN113300197B (en) * | 2021-05-06 | 2022-11-01 | 南京帕卓丽电子科技有限公司 | Relay light amplification system with pumping unit as center for multi-core optical fiber communication system |
CN113675710A (en) * | 2021-08-17 | 2021-11-19 | 中国电子科技集团公司第十四研究所 | Distributed optical fiber amplifier and array thereof |
CN117335256B (en) * | 2023-12-01 | 2024-03-08 | 上海频准激光科技有限公司 | Optical signal power control system |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10971885B2 (en) * | 2014-06-02 | 2021-04-06 | Nlight, Inc. | Scalable high power fiber laser |
Family Cites Families (368)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3388461A (en) | 1965-01-26 | 1968-06-18 | Sperry Rand Corp | Precision electrical component adjustment method |
GB1502127A (en) | 1975-01-27 | 1978-02-22 | Xerox Corp | Geometrical transformations in optics |
US4266851A (en) | 1979-11-06 | 1981-05-12 | International Telephone And Telegraph Corporation | Coupler for a concentric core optical fiber |
US4252403A (en) | 1979-11-06 | 1981-02-24 | International Telephone And Telegraph Corporation | Coupler for a graded index fiber |
US4475789A (en) | 1981-11-09 | 1984-10-09 | Canadian Patents & Development Limited | Optical fiber power tap |
US4475027A (en) | 1981-11-17 | 1984-10-02 | Allied Corporation | Optical beam homogenizer |
US4713518A (en) | 1984-06-08 | 1987-12-15 | Semiconductor Energy Laboratory Co., Ltd. | Electronic device manufacturing methods |
US4953947A (en) | 1986-08-08 | 1990-09-04 | Corning Incorporated | Dispersion transformer having multichannel fiber |
US4863538A (en) | 1986-10-17 | 1989-09-05 | Board Of Regents, The University Of Texas System | Method and apparatus for producing parts by selective sintering |
RU2021881C1 (en) | 1986-10-17 | 1994-10-30 | Борд оф Риджентс, Дзе Юниверсити оф Тексас Систем | Method to produce a part and the device to fulfill it |
US5008555A (en) | 1988-04-08 | 1991-04-16 | Eaton Leonard Technologies, Inc. | Optical probe with overlapping detection fields |
US5082349A (en) | 1988-04-25 | 1992-01-21 | The Board Of Trustees Of The Leland Stanford Junior University | Bi-domain two-mode single crystal fiber devices |
DE3833992A1 (en) | 1988-10-06 | 1990-04-12 | Messerschmitt Boelkow Blohm | RADIATION DEVICE |
JPH0748330B2 (en) | 1989-02-21 | 1995-05-24 | 帝国通信工業株式会社 | Electronic component resin molded case with built-in flexible substrate and method of manufacturing the same |
US5153773A (en) | 1989-06-08 | 1992-10-06 | Canon Kabushiki Kaisha | Illumination device including amplitude-division and beam movements |
ES2063953T3 (en) | 1989-08-14 | 1995-01-16 | Ciba Geigy Ag | CONNECTION BY PLUG FOR LIGHT WAVE CONDUCTOR. |
JPH03216287A (en) | 1990-01-19 | 1991-09-24 | Fanuc Ltd | Laser beam cutting method |
US5231464A (en) | 1990-03-26 | 1993-07-27 | Research Development Corporation Of Japan | Highly directional optical system and optical sectional image forming apparatus employing the same |
RU2008742C1 (en) | 1991-03-04 | 1994-02-28 | Рыков Вениамин Васильевич | Process of doping of semiconductors |
GB9106874D0 (en) | 1991-04-02 | 1991-05-22 | Lumonics Ltd | Optical fibre assembly for a laser system |
US6569382B1 (en) | 1991-11-07 | 2003-05-27 | Nanogen, Inc. | Methods apparatus for the electronic, homogeneous assembly and fabrication of devices |
US5252991A (en) | 1991-12-17 | 1993-10-12 | Hewlett-Packard Company | Media edge sensor utilizing a laser beam scanner |
DE4200587C1 (en) | 1992-01-11 | 1993-04-01 | Schott Glaswerke, 6500 Mainz, De | Light wave applicator for cutting and coagulating biological tissue - applies laser beam via flexible optical fibre having non-constant refractive index profile along its cross=section |
US5475415A (en) | 1992-06-03 | 1995-12-12 | Eastman Kodak Company | Optical head and printing system forming interleaved output laser light beams |
JP3175994B2 (en) | 1993-04-15 | 2001-06-11 | 松下電工株式会社 | Laser irradiation method and laser irradiation apparatus, and three-dimensional circuit forming method, surface treatment method, and powder adhering method |
RU2111520C1 (en) | 1993-07-21 | 1998-05-20 | Фирма "Самсунг Электроникс Ко., Лтд." | Optical processor with booster input |
US5393482A (en) | 1993-10-20 | 1995-02-28 | United Technologies Corporation | Method for performing multiple beam laser sintering employing focussed and defocussed laser beams |
US5427733A (en) | 1993-10-20 | 1995-06-27 | United Technologies Corporation | Method for performing temperature-controlled laser sintering |
JP3531199B2 (en) | 1994-02-22 | 2004-05-24 | 三菱電機株式会社 | Optical transmission equipment |
US5656186A (en) | 1994-04-08 | 1997-08-12 | The Regents Of The University Of Michigan | Method for controlling configuration of laser induced breakdown and ablation |
US5566196A (en) | 1994-10-27 | 1996-10-15 | Sdl, Inc. | Multiple core fiber laser and optical amplifier |
US5903696A (en) | 1995-04-21 | 1999-05-11 | Ceramoptec Industries Inc | Multimode optical waveguides, waveguide components and sensors |
US5748824A (en) | 1995-11-17 | 1998-05-05 | Corning Incorporated | Positive dispersion optical waveguide |
US5745284A (en) | 1996-02-23 | 1998-04-28 | President And Fellows Of Harvard College | Solid-state laser source of tunable narrow-bandwidth ultraviolet radiation |
US5909306A (en) | 1996-02-23 | 1999-06-01 | President And Fellows Of Harvard College | Solid-state spectrally-pure linearly-polarized pulsed fiber amplifier laser system useful for ultraviolet radiation generation |
US5761234A (en) | 1996-07-09 | 1998-06-02 | Sdl, Inc. | High power, reliable optical fiber pumping system with high redundancy for use in lightwave communication systems |
US5864430A (en) | 1996-09-10 | 1999-01-26 | Sandia Corporation | Gaussian beam profile shaping apparatus, method therefor and evaluation thereof |
US6212310B1 (en) * | 1996-10-22 | 2001-04-03 | Sdl, Inc. | High power fiber gain media system achieved through power scaling via multiplexing |
UA47454C2 (en) | 1996-12-20 | 2002-07-15 | Научний Центр Волоконной Оптікі Прі Інстітутє Общєй Фізікі Россійской Акадєміі Наук | Fiber converter of the mode field diameter, method for local chanche of the refractive index of the optical waveguides and a method for preparing raw stock for optical waveguides |
US5986807A (en) | 1997-01-13 | 1999-11-16 | Xerox Corporation | Single binary optical element beam homogenizer |
US6266181B1 (en) | 1997-02-14 | 2001-07-24 | Nippon Telegraph And Telephone Corporation | Tellurite glass, optical amplifier, and light source |
JPH10321502A (en) | 1997-05-16 | 1998-12-04 | Nikon Corp | Charged particle beam projection method |
DE19723269A1 (en) * | 1997-06-03 | 1998-12-10 | Heidelberger Druckmasch Ag | Solid state lasers with one or more pump light sources |
JPH11780A (en) | 1997-06-10 | 1999-01-06 | Ishikawajima Harima Heavy Ind Co Ltd | Laser water jet composite cutting device |
EP0886174A3 (en) | 1997-06-18 | 2001-03-07 | Nippon Telegraph And Telephone Corporation | White optical pulse source and applications |
US5818630A (en) | 1997-06-25 | 1998-10-06 | Imra America, Inc. | Single-mode amplifiers and compressors based on multi-mode fibers |
DE19746171C2 (en) | 1997-10-18 | 2001-05-17 | Deutsche Telekom Ag | Device for decoupling signals from an optical waveguide |
WO1999033603A1 (en) | 1997-12-26 | 1999-07-08 | Mitsubishi Denki Kabushiki Kaisha | Laser machining apparatus |
CA2321782C (en) | 1998-03-04 | 2007-05-22 | Sdl, Inc. | Optical couplers for multimode fibers |
JP3396422B2 (en) | 1998-04-01 | 2003-04-14 | 日本電信電話株式会社 | Optical fiber connection method and connection device |
JP3389101B2 (en) | 1998-06-03 | 2003-03-24 | 日本電信電話株式会社 | Optical fiber connector and optical amplifier using the optical fiber connector |
US6987786B2 (en) * | 1998-07-02 | 2006-01-17 | Gsi Group Corporation | Controlling laser polarization |
US6490376B1 (en) | 1998-09-17 | 2002-12-03 | Metrologic Instruments, Inc. | Skew processing of raster scan images |
US6275630B1 (en) | 1998-11-17 | 2001-08-14 | Bayspec, Inc. | Compact double-pass wavelength multiplexer-demultiplexer |
US6310995B1 (en) | 1998-11-25 | 2001-10-30 | University Of Maryland | Resonantly coupled waveguides using a taper |
WO2000033116A1 (en) * | 1998-12-02 | 2000-06-08 | Corning Incorporated | A detachable plug-in pump card assembly |
US6483973B1 (en) | 1999-04-09 | 2002-11-19 | Fitel Usa Corp. | Cladding member for optical fibers and optical fibers formed with the cladding member |
TW482705B (en) | 1999-05-28 | 2002-04-11 | Electro Scient Ind Inc | Beam shaping and projection imaging with solid state UV Gaussian beam to form blind vias |
US6839163B1 (en) * | 1999-09-01 | 2005-01-04 | Avanex Corporation | Apparatus and method for making an optical fiber amplifier |
NO994363L (en) | 1999-09-09 | 2001-03-12 | Optomed As | Fiber optic probe for temperature measurements in biological media |
CA2293132C (en) | 1999-12-24 | 2007-03-06 | Jocelyn Lauzon | Triple-clad rare-earth doped optical fiber and applications |
US7068900B2 (en) | 1999-12-24 | 2006-06-27 | Croteau Andre | Multi-clad doped optical fiber |
US8217304B2 (en) | 2001-03-29 | 2012-07-10 | Gsi Group Corporation | Methods and systems for thermal-based laser processing a multi-material device |
US6330382B1 (en) | 2000-01-19 | 2001-12-11 | Corning Incorporated | Mode conditioning for multimode fiber systems |
US7098084B2 (en) | 2000-03-08 | 2006-08-29 | Semiconductor Energy Laboratory Co., Ltd. | Semiconductor device and manufacturing method thereof |
US6496301B1 (en) | 2000-03-10 | 2002-12-17 | The United States Of America As Represented By The Secretary Of The Navy | Helical fiber amplifier |
US6559585B2 (en) | 2000-05-26 | 2003-05-06 | Kabushiki Kaisha Toshiba | Color cathode ray tube |
US6477307B1 (en) | 2000-10-23 | 2002-11-05 | Nufern | Cladding-pumped optical fiber and methods for fabricating |
US7193771B1 (en) | 2001-01-04 | 2007-03-20 | Lockheed Martin Coherent Technologies, Inc. | Power scalable optical systems for generating, transporting, and delivering high power, high quality laser beams |
JP2002214460A (en) | 2001-01-19 | 2002-07-31 | Japan Aviation Electronics Industry Ltd | Optical waveguide device and its manufacturing method |
CN1268950C (en) | 2001-01-25 | 2006-08-09 | 全波导通信公司 | Low-loss photonic crystal waveguide having large core radius |
CA2436151A1 (en) | 2001-01-25 | 2002-08-01 | Omniguide Communications | Photonic crystal optical waveguides having tailored dispersion profiles |
JP2004521379A (en) | 2001-01-31 | 2004-07-15 | オムニガイド コミュニケーションズ インコーポレイテッド | Electromagnetic mode conversion of photonic crystal multimode waveguide |
US6711918B1 (en) | 2001-02-06 | 2004-03-30 | Sandia National Laboratories | Method of bundling rods so as to form an optical fiber preform |
US20020110328A1 (en) * | 2001-02-14 | 2002-08-15 | Bischel William K. | Multi-channel laser pump source for optical amplifiers |
US6542665B2 (en) | 2001-02-17 | 2003-04-01 | Lucent Technologies Inc. | GRIN fiber lenses |
US6426840B1 (en) | 2001-02-23 | 2002-07-30 | 3D Systems, Inc. | Electronic spot light control |
US6724528B2 (en) | 2001-02-27 | 2004-04-20 | The United States Of America As Represented By The Secretary Of The Navy | Polarization-maintaining optical fiber amplifier employing externally applied stress-induced birefringence |
JP3399434B2 (en) | 2001-03-02 | 2003-04-21 | オムロン株式会社 | Method for forming plating of polymer molding material, circuit forming part, and method for manufacturing this circuit forming part |
US20020168139A1 (en) | 2001-03-30 | 2002-11-14 | Clarkson William Andrew | Optical fiber terminations, optical couplers and optical coupling methods |
US6556340B1 (en) * | 2001-04-06 | 2003-04-29 | Onetta, Inc. | Optical amplifiers and upgrade modules |
CN1275057C (en) | 2001-04-11 | 2006-09-13 | 晶体纤维公司 | Dual Core photonic crystal fibers (PCF) with special dispersion properties |
JP2004533390A (en) | 2001-04-12 | 2004-11-04 | オムニガイド コミュニケーションズ インコーポレイテッド | High refractive index contrast optical waveguides and applications |
US7009140B2 (en) | 2001-04-18 | 2006-03-07 | Cymer, Inc. | Laser thin film poly-silicon annealing optical system |
US6597829B2 (en) | 2001-04-27 | 2003-07-22 | Robert H. Cormack | 1xN optical fiber switch |
US6831934B2 (en) | 2001-05-29 | 2004-12-14 | Apollo Instruments, Inc. | Cladding pumped fiber laser |
ATE373249T1 (en) | 2001-07-12 | 2007-09-15 | Ocg Technology Licensing Llc | OPTICAL FIBER |
WO2003008943A1 (en) | 2001-07-19 | 2003-01-30 | Tufts University | Optical array device and methods of use thereof for screening, analysis and manipulation of particles |
EP1419361A1 (en) | 2001-08-23 | 2004-05-19 | Zygo Corporation | Dynamic interferometric controlling direction of input beam |
KR100439088B1 (en) | 2001-09-14 | 2004-07-05 | 한국과학기술원 | Optical coupling module with self-aligned etched grooves and method for fabricating the same |
US6866429B2 (en) | 2001-09-26 | 2005-03-15 | Np Photonics, Inc. | Method of angle fusion splicing silica fiber with low-temperature non-silica fiber |
JP2003129862A (en) | 2001-10-23 | 2003-05-08 | Toshiba Corp | Turbine blade production method |
US6825974B2 (en) | 2001-11-06 | 2004-11-30 | Sandia National Laboratories | Linearly polarized fiber amplifier |
US20040097103A1 (en) | 2001-11-12 | 2004-05-20 | Yutaka Imai | Laser annealing device and thin-film transistor manufacturing method |
AU2002366156A1 (en) | 2001-11-16 | 2003-06-10 | Optical Power Systems Inc. | Multi-wavelength raman fiber laser |
US6671293B2 (en) | 2001-11-19 | 2003-12-30 | Chiral Photonics, Inc. | Chiral fiber laser apparatus and method |
US6819815B1 (en) | 2001-12-12 | 2004-11-16 | Calient Networks | Method and apparatus for indirect adjustment of optical switch reflectors |
JP2003200286A (en) | 2001-12-28 | 2003-07-15 | Fujitsu Ltd | Laser microspot welding equipment |
EP1340583A1 (en) | 2002-02-20 | 2003-09-03 | ALSTOM (Switzerland) Ltd | Method of controlled remelting of or laser metal forming on the surface of an article |
US6768577B2 (en) | 2002-03-15 | 2004-07-27 | Fitel Usa Corp. | Tunable multimode laser diode module, tunable multimode wavelength division multiplex raman pump, and amplifier, and a system, method, and computer program product for controlling tunable multimode laser diodes, raman pumps, and raman amplifiers |
US7116887B2 (en) | 2002-03-19 | 2006-10-03 | Nufern | Optical fiber |
US6700161B2 (en) | 2002-05-16 | 2004-03-02 | International Business Machines Corporation | Variable resistor structure and method for forming and programming a variable resistor for electronic circuits |
US6816662B2 (en) | 2002-09-19 | 2004-11-09 | 3M Innovative Properties Company | Article for cleaving and polishing optical fiber ends |
ITMI20022328A1 (en) | 2002-10-31 | 2004-05-01 | Carlo Nobili S P A Rubinetterie | MIXING CARTRIDGE FOR SINGLE LEVER MIXER TAPS |
DE10352590A1 (en) | 2002-11-12 | 2004-05-27 | Toptica Photonics Ag | Method for manufacturing optical fibre with output point for stray light and measuring fibre optical power, with optical fibre contiguous core , and surrounding sleeve with second lower refraction index, while fibre section |
US20040137168A1 (en) | 2002-11-22 | 2004-07-15 | Vladimir Fuflyigin | Dielectric waveguide and method of making the same |
WO2004049025A1 (en) | 2002-11-23 | 2004-06-10 | Crystal Fibre A/S | Splicing and connectorization of photonic crystal fibres |
US7099535B2 (en) | 2002-12-31 | 2006-08-29 | Corning Incorporated | Small mode-field fiber lens |
CA2514800C (en) * | 2003-02-07 | 2014-01-07 | Southampton Photonics Ltd. | Apparatus for providing optical radiation |
US7046432B2 (en) * | 2003-02-11 | 2006-05-16 | Coherent, Inc. | Optical fiber coupling arrangement |
JP4505190B2 (en) | 2003-03-27 | 2010-07-21 | 新日本製鐵株式会社 | Laser cutting device |
DE20320269U1 (en) | 2003-03-28 | 2004-04-15 | Raylase Ag | Optical system with adjustable total length for variable focussing of light (laser) beam, with lens module in light beam path for laser 3D scanners also for writing, marking, cutting |
US7050660B2 (en) | 2003-04-07 | 2006-05-23 | Eksigent Technologies Llc | Microfluidic detection device having reduced dispersion and method for making same |
US6963062B2 (en) | 2003-04-07 | 2005-11-08 | Eksigent Technologies, Llc | Method for multiplexed optical detection including a multimode optical fiber in which propagation modes are coupled |
DE10321102A1 (en) | 2003-05-09 | 2004-12-02 | Hentze-Lissotschenko Patentverwaltungs Gmbh & Co.Kg | Splitting device for light rays |
US6801550B1 (en) * | 2003-05-30 | 2004-10-05 | Bae Systems Information And Electronic Systems Integration Inc. | Multiple emitter side pumping method and apparatus for fiber lasers |
DE602004031941D1 (en) | 2003-05-30 | 2011-05-05 | Olympus Co | MEASURING DEVICE COMPRISING A LIGHT RECORDING UNIT |
US20050041697A1 (en) | 2003-06-12 | 2005-02-24 | Martin Seifert | Portable laser |
US6970624B2 (en) | 2003-06-13 | 2005-11-29 | Furukawa Electric North America | Cladding pumped optical fiber gain devices |
US7170913B2 (en) * | 2003-06-19 | 2007-01-30 | Multiwave Photonics, Sa | Laser source with configurable output beam characteristics |
GB0314817D0 (en) | 2003-06-25 | 2003-07-30 | Southampton Photonics Ltd | Apparatus for providing optical radiation |
JP2005046247A (en) | 2003-07-31 | 2005-02-24 | Topcon Corp | Laser surgery apparatus |
JP2005070608A (en) | 2003-08-27 | 2005-03-17 | Mitsubishi Cable Ind Ltd | Splicing structure of double clad fiber, and multimode fiber and method for splicing the same |
US7151787B2 (en) | 2003-09-10 | 2006-12-19 | Sandia National Laboratories | Backscatter absorption gas imaging systems and light sources therefore |
US7016573B2 (en) * | 2003-11-13 | 2006-03-21 | Imra America, Inc. | Optical fiber pump multiplexer |
WO2005057737A2 (en) | 2003-12-04 | 2005-06-23 | Optical Air Data Systems, Lp | Very high power pulsed fiber laser |
GB0328370D0 (en) | 2003-12-05 | 2004-01-14 | Southampton Photonics Ltd | Apparatus for providing optical radiation |
US7527977B1 (en) | 2004-03-22 | 2009-05-05 | Sandia Corporation | Protein detection system |
US7349123B2 (en) | 2004-03-24 | 2008-03-25 | Lexmark International, Inc. | Algorithms and methods for determining laser beam process direction position errors from data stored on a printhead |
US7804864B2 (en) | 2004-03-31 | 2010-09-28 | Imra America, Inc. | High power short pulse fiber laser |
US7486705B2 (en) | 2004-03-31 | 2009-02-03 | Imra America, Inc. | Femtosecond laser processing system with process parameters, controls and feedback |
US7167622B2 (en) | 2004-04-08 | 2007-01-23 | Omniguide, Inc. | Photonic crystal fibers and medical systems including photonic crystal fibers |
US7231122B2 (en) | 2004-04-08 | 2007-06-12 | Omniguide, Inc. | Photonic crystal waveguides and systems using such waveguides |
US7317857B2 (en) | 2004-05-03 | 2008-01-08 | Nufem | Optical fiber for delivering optical energy to or from a work object |
US20070195850A1 (en) | 2004-06-01 | 2007-08-23 | Trumpf Photonics Inc. | Diode laser array stack |
CN1584644A (en) | 2004-06-02 | 2005-02-23 | 中国科学院上海光学精密机械研究所 | Beam shaping optical fibre |
US7146073B2 (en) | 2004-07-19 | 2006-12-05 | Quantronix Corporation | Fiber delivery system with enhanced passive fiber protection and active monitoring |
US20060024001A1 (en) | 2004-07-28 | 2006-02-02 | Kyocera Corporation | Optical fiber connected body with mutually coaxial and inclined cores, optical connector for forming the same, and mode conditioner and optical transmitter using the same |
JP4519560B2 (en) | 2004-07-30 | 2010-08-04 | 株式会社メディアプラス | Additive manufacturing method |
JP4293098B2 (en) | 2004-09-15 | 2009-07-08 | セイコーエプソン株式会社 | Laser processing method, laser processing equipment, electronic equipment |
US8834457B2 (en) | 2004-09-22 | 2014-09-16 | Cao Group, Inc. | Modular surgical laser systems |
JP2006098085A (en) | 2004-09-28 | 2006-04-13 | Toyota Motor Corp | Texture prediction method of build-up layer |
JP2006171348A (en) * | 2004-12-15 | 2006-06-29 | Nippon Steel Corp | Semiconductor laser device |
JP4328724B2 (en) | 2005-01-17 | 2009-09-09 | 富士通株式会社 | Optical waveform measuring apparatus and optical waveform measuring method |
ATE457070T1 (en) | 2005-03-18 | 2010-02-15 | Univ Danmarks Tekniske | OPTICAL MANIPULATION SYSTEM WITH MULTIPLE OPTICAL TRAPS |
US8395084B2 (en) | 2005-05-02 | 2013-03-12 | Semiconductor Energy Laboratory Co., Ltd. | Laser irradiation apparatus and laser irradiation method |
JPWO2007013608A1 (en) * | 2005-07-28 | 2009-02-12 | パナソニック株式会社 | Laser light source and display device |
US7391561B2 (en) | 2005-07-29 | 2008-06-24 | Aculight Corporation | Fiber- or rod-based optical source featuring a large-core, rare-earth-doped photonic-crystal device for generation of high-power pulsed radiation and method |
US7674719B2 (en) | 2005-08-01 | 2010-03-09 | Panasonic Corporation | Via hole machining for microwave monolithic integrated circuits |
US7218440B2 (en) | 2005-08-25 | 2007-05-15 | Northrop Grumman Corporation | Photonic bandgap fiber for generating near-diffraction-limited optical beam comprising multiple coaxial wavelengths |
CN100349554C (en) * | 2005-08-31 | 2007-11-21 | 北京光电技术研究所 | Laser therapeutic system |
US7626138B2 (en) | 2005-09-08 | 2009-12-01 | Imra America, Inc. | Transparent material processing with an ultrashort pulse laser |
US20070075060A1 (en) | 2005-09-30 | 2007-04-05 | Shedlov Matthew S | Method of manufacturing a medical device from a workpiece using a pulsed beam of radiation or particles having an adjustable pulse frequency |
US7463805B2 (en) | 2005-10-20 | 2008-12-09 | Corning Incorporated | High numerical aperture optical fiber |
US7551813B2 (en) | 2005-11-03 | 2009-06-23 | Gennadii Ivtsenkov | Simplified fiber-optic switch for all-optical fiber-optic lines |
US7099533B1 (en) | 2005-11-08 | 2006-08-29 | Chenard Francois | Fiber optic infrared laser beam delivery system |
US8728387B2 (en) | 2005-12-06 | 2014-05-20 | Howmedica Osteonics Corp. | Laser-produced porous surface |
US7764854B2 (en) | 2005-12-27 | 2010-07-27 | Ofs Fitel Llc | Optical fiber with specialized index profile to compensate for bend-induced distortions |
US7920767B2 (en) | 2005-12-27 | 2011-04-05 | Ofs Fitel, Llc | Suppression of higher-order modes by resonant coupling in bend-compensated optical fibers |
US7783149B2 (en) | 2005-12-27 | 2010-08-24 | Furukawa Electric North America, Inc. | Large-mode-area optical fibers with reduced bend distortion |
CA2533674A1 (en) | 2006-01-23 | 2007-07-23 | Itf Technologies Optiques Inc./Itf Optical Technologies Inc. | Optical fiber component package for high power dissipation |
FR2897007B1 (en) | 2006-02-03 | 2008-04-11 | Air Liquide | METHOD OF CUTTING WITH A FIBER LASER WITH BEAM PARAMETER CONTROL |
US7466731B2 (en) * | 2006-02-24 | 2008-12-16 | Northrop Grumman Corporation | High efficiency, high power cryogenic laser system |
WO2007103898A2 (en) | 2006-03-03 | 2007-09-13 | Aculight Corporation | Diode-laser-pump module with integrated signal ports for pumping amplifying fibers |
US7835608B2 (en) | 2006-03-21 | 2010-11-16 | Lockheed Martin Corporation | Method and apparatus for optical delivery fiber having cladding with absorbing regions |
US7628865B2 (en) | 2006-04-28 | 2009-12-08 | Asml Netherlands B.V. | Methods to clean a surface, a device manufacturing method, a cleaning assembly, cleaning apparatus, and lithographic apparatus |
JP5089950B2 (en) * | 2006-05-30 | 2012-12-05 | 株式会社フジクラ | Multi-port coupler, optical amplifier and fiber laser |
WO2007148127A2 (en) * | 2006-06-23 | 2007-12-27 | Gsi Group Limited | Fibre laser system |
US8718411B2 (en) | 2006-07-07 | 2014-05-06 | The University Of Sydney | Tunable optical supercontinuum enhancement |
US7257293B1 (en) | 2006-07-14 | 2007-08-14 | Furukawa Electric North America, Inc. | Fiber structure with improved bend resistance |
US7880961B1 (en) | 2006-08-22 | 2011-02-01 | Sandia Corporation | Optical amplifier exhibiting net phase-mismatch selected to at least partially reduce gain-induced phase-matching during operation and method of operation |
US7674999B2 (en) | 2006-08-23 | 2010-03-09 | Applied Materials, Inc. | Fast axis beam profile shaping by collimation lenslets for high power laser diode based annealing system |
EP2087400B1 (en) | 2006-10-26 | 2019-10-16 | Cornell Research Foundation, Inc. | Production of optical pulses at a desired wavelength using soliton self-frequency shift in higher-order-mode fiber |
WO2008053915A1 (en) | 2006-11-02 | 2008-05-08 | Nabtesco Corporation | Scanner optical system, laser processing device, and scanner optical device |
RU68715U1 (en) | 2006-11-20 | 2007-11-27 | Государственное образовательное учреждение высшего профессионального образования "Кубанский государственный университет" (ГОУ ВПО КубГУ) | INTEGRAL OPTICAL RADIATION DIVIDER |
GB0623835D0 (en) | 2006-11-29 | 2007-01-10 | Cascade Technologies Ltd | Multi mode fibre perturber |
KR100872281B1 (en) | 2006-12-15 | 2008-12-05 | 삼성전기주식회사 | Semiconductor light emitting device having nano-wire structure and method for fabricating the same |
ITMI20070150A1 (en) | 2007-01-31 | 2008-08-01 | Univ Pavia | METHOD AND OPTICAL DEVICE FOR THE MANIPULATION OF A PARTICLE |
US7526166B2 (en) | 2007-01-31 | 2009-04-28 | Corning Incorporated | High numerical aperture fiber |
JP4674696B2 (en) | 2007-04-03 | 2011-04-20 | 日本特殊陶業株式会社 | Manufacturing method of spark plug |
JP5147834B2 (en) | 2007-04-04 | 2013-02-20 | 三菱電機株式会社 | Laser processing apparatus and laser processing method |
WO2008133242A1 (en) | 2007-04-25 | 2008-11-06 | Fujikura Ltd. | Rare earth-added core optical fiber |
JP5124225B2 (en) | 2007-05-15 | 2013-01-23 | 株式会社フジクラ | Optical fiber fusion splicing structure |
DE102007063066A1 (en) | 2007-05-31 | 2008-12-24 | Lpi Light Power Instruments Gmbh | Method and device for characterizing a sample with two or more optical traps |
CN101796697A (en) | 2007-07-16 | 2010-08-04 | 科拉克蒂夫高科技公司 | Luminescent device with phosphosilicate glass |
US7924500B1 (en) | 2007-07-21 | 2011-04-12 | Lockheed Martin Corporation | Micro-structured fiber profiles for mitigation of bend-loss and/or mode distortion in LMA fiber amplifiers, including dual-core embodiments |
US7876495B1 (en) | 2007-07-31 | 2011-01-25 | Lockheed Martin Corporation | Apparatus and method for compensating for and using mode-profile distortions caused by bending optical fibers |
JP2009032910A (en) | 2007-07-27 | 2009-02-12 | Hitachi Cable Ltd | Optical fiber for optical fiber laser, method of manufacturing the same and optical fiber laser |
KR100906287B1 (en) | 2007-08-22 | 2009-07-06 | 광주과학기술원 | Optical Fiber Probe for Side Imaging and Method of Manufacturing the same |
US8027557B2 (en) | 2007-09-24 | 2011-09-27 | Nufern | Optical fiber laser, and components for an optical fiber laser, having reduced susceptibility to catastrophic failure under high power operation |
US7593435B2 (en) | 2007-10-09 | 2009-09-22 | Ipg Photonics Corporation | Powerful fiber laser system |
EP2206176B1 (en) | 2007-10-23 | 2021-07-07 | Koninklijke Philips N.V. | Method for lighting |
DE102007052657B4 (en) | 2007-11-05 | 2010-03-11 | Raylase Ag | Lens device with a displaceable lens and laser scanner system |
TWI352215B (en) | 2007-11-21 | 2011-11-11 | Ind Tech Res Inst | Beam shaping module |
RU2365476C1 (en) | 2007-11-26 | 2009-08-27 | Государственное Научное Учреждение "Институт Физики Имени Б.И. Степанова Национальной Академии Наук Беларуси" | Device of multiway laser processing |
JP5201975B2 (en) | 2007-12-14 | 2013-06-05 | 株式会社キーエンス | Laser processing apparatus and laser processing method |
US7957438B2 (en) | 2007-12-17 | 2011-06-07 | Jds Uniphase Corporation | Method and device for monitoring light |
BY12235C1 (en) | 2007-12-18 | 2009-08-30 | ||
US7982161B2 (en) | 2008-03-24 | 2011-07-19 | Electro Scientific Industries, Inc. | Method and apparatus for laser drilling holes with tailored laser pulses |
JP2009248157A (en) | 2008-04-08 | 2009-10-29 | Miyachi Technos Corp | Laser beam machining method and apparatus |
US8135275B2 (en) | 2008-05-29 | 2012-03-13 | Heismann Fred L | Measuring chromatic dispersion in an optical wavelength channel of an optical fiber link |
JP2010015135A (en) | 2008-06-03 | 2010-01-21 | Hitachi Cable Ltd | Optical waveguide substrate with optical fiber fixation groove, process for its production, stamp for use in this production process, and opto-electronic hybrid integrated module including the optical waveguide substrate |
EP2288948A4 (en) | 2008-06-20 | 2011-12-28 | Gen Hospital Corp | Fused fiber optic coupler arrangement and method for use thereof |
EP2324379B1 (en) | 2008-06-25 | 2017-05-03 | Coractive High-Tech Inc. | Energy dissipating packages for high power operation of optical fiber components |
US8139951B2 (en) | 2008-06-26 | 2012-03-20 | Igor Samartsev | Fiber-optic long-haul transmission system |
IT1391337B1 (en) | 2008-08-07 | 2011-12-05 | Univ Roma | INTEGRATED RADIO-ELECTRIC LOCATION SYSTEM BASED ON NOISY OF WAVE |
US8711471B2 (en) | 2008-08-21 | 2014-04-29 | Nlight Photonics Corporation | High power fiber amplifier with stable output |
US9158070B2 (en) | 2008-08-21 | 2015-10-13 | Nlight Photonics Corporation | Active tapers with reduced nonlinearity |
US8873134B2 (en) | 2008-08-21 | 2014-10-28 | Nlight Photonics Corporation | Hybrid laser amplifier system including active taper |
US9285541B2 (en) | 2008-08-21 | 2016-03-15 | Nlight Photonics Corporation | UV-green converting fiber laser using active tapers |
FR2935916B1 (en) | 2008-09-12 | 2011-08-26 | Air Liquide | METHOD AND INSTALLATION FOR LASER CUTTING WITH MODIFICATION OF THE QUALITY FACTOR OF THE LASER BEAM |
KR20100045675A (en) | 2008-10-24 | 2010-05-04 | 삼성전자주식회사 | Display apparatus |
CA2743522C (en) | 2008-11-21 | 2015-05-26 | Precitec Itm Gmbh | Method and device for monitoring a laser processing operation to be performed on a workpiece, and laser processing head having such a device |
US8270786B2 (en) | 2008-11-21 | 2012-09-18 | Ofs Fitel, Llc | Optical fiber mode couplers |
US8317413B2 (en) | 2008-11-25 | 2012-11-27 | Gooch and Hoosego PLC | Packaging for fused fiber devices for high power applications |
CN101435918B (en) | 2008-11-26 | 2010-04-14 | 北京交通大学 | Tail fiber coupling output device of laser diode array / surface array |
US7839901B2 (en) | 2008-12-03 | 2010-11-23 | Ipg Photonics Corporation | High power fiber laser system with cladding light stripper |
US8526110B1 (en) | 2009-02-17 | 2013-09-03 | Lockheed Martin Corporation | Spectral-beam combining for high-power fiber-ring-laser systems |
US8275007B2 (en) | 2009-05-04 | 2012-09-25 | Ipg Photonics Corporation | Pulsed laser system with optimally configured saturable absorber |
DE102009026526A1 (en) | 2009-05-28 | 2010-12-02 | Robert Bosch Gmbh | laser device |
TWI523720B (en) | 2009-05-28 | 2016-03-01 | 伊雷克托科學工業股份有限公司 | Acousto-optic deflector applications in laser processing of features in a workpiece, and related laser processing method |
US8622625B2 (en) | 2009-05-29 | 2014-01-07 | Corning Incorporated | Fiber end face void closing method, a connectorized optical fiber assembly, and method of forming same |
DE102009027348A1 (en) | 2009-06-30 | 2011-01-05 | Trumpf Laser Gmbh + Co. Kg | Optical beam switch |
US8593725B2 (en) | 2009-08-04 | 2013-11-26 | Jds Uniphase Corporation | Pulsed optical source |
US8184363B2 (en) | 2009-08-07 | 2012-05-22 | Northrop Grumman Systems Corporation | All-fiber integrated high power coherent beam combination |
US8755649B2 (en) * | 2009-10-19 | 2014-06-17 | Lockheed Martin Corporation | In-line forward/backward fiber-optic signal analyzer |
CN102136669A (en) * | 2009-12-08 | 2011-07-27 | 韩国电子通信研究院 | Double clad fiber laser device |
US8251475B2 (en) | 2009-12-14 | 2012-08-28 | Eastman Kodak Company | Position detection with two-dimensional sensor in printer |
WO2011077607A1 (en) | 2009-12-21 | 2011-06-30 | シャープ株式会社 | Active matrix substrate, display panel provided with same, and method for manufacturing active matrix substrate |
US8452145B2 (en) | 2010-02-24 | 2013-05-28 | Corning Incorporated | Triple-clad optical fibers and devices with triple-clad optical fibers |
KR101100343B1 (en) | 2010-03-03 | 2011-12-30 | 도요 가라스 가부시키가이샤 | Lateral light emitting device and method of producing the same |
US20110305256A1 (en) * | 2010-03-05 | 2011-12-15 | TeraDiode, Inc. | Wavelength beam combining based laser pumps |
US9023217B2 (en) | 2010-03-23 | 2015-05-05 | Cambrios Technologies Corporation | Etch patterning of nanostructure transparent conductors |
WO2011122566A1 (en) | 2010-03-30 | 2011-10-06 | 株式会社フジクラ | Light intensity monitoring circuit and fiber laser system |
US8243764B2 (en) | 2010-04-01 | 2012-08-14 | Tucker Derek A | Frequency conversion of a laser beam using a partially phase-mismatched nonlinear crystal |
DE102010003750A1 (en) | 2010-04-08 | 2011-10-13 | Trumpf Laser- Und Systemtechnik Gmbh | Method and arrangement for changing the beam profile characteristic of a laser beam by means of a multiple-clad fiber |
DE112011101288T5 (en) | 2010-04-12 | 2013-02-07 | Lockheed Martin Corporation | Beam diagnostic and feedback system and methods for spectrally beam combined lasers |
WO2011129065A1 (en) | 2010-04-16 | 2011-10-20 | シャープ株式会社 | Display device |
WO2011146407A2 (en) | 2010-05-16 | 2011-11-24 | Fianium, Inc. | Tunable pulse width laser |
CN101854026B (en) * | 2010-05-18 | 2011-11-09 | 中国科学院上海光学精密机械研究所 | Full solid-state laser for integrated laser diode intracavity pump |
EP2579276A4 (en) | 2010-05-28 | 2014-02-19 | Shinetsu Polymer Co | Transparent conductive film and conductive substrate using the same |
WO2011153320A2 (en) | 2010-06-02 | 2011-12-08 | University Of Delaware | Integrated concentrating photovoltaics |
US8254417B2 (en) | 2010-06-14 | 2012-08-28 | Ipg Photonics Corporation | Fiber laser system with controllably alignable optical components thereof |
CN101907742B (en) | 2010-06-21 | 2012-07-11 | 哈尔滨工程大学 | Array optical tweezers based on multicore polarization-preserving fiber and manufacturing method thereof |
WO2012002086A1 (en) | 2010-06-28 | 2012-01-05 | Sumitomo Electric Industries, Ltd. | Laser apparatus |
US8027555B1 (en) | 2010-06-30 | 2011-09-27 | Jds Uniphase Corporation | Scalable cladding mode stripper device |
US8509577B2 (en) | 2010-07-02 | 2013-08-13 | St. Jude Medical, Inc. | Fiberoptic device with long focal length gradient-index or grin fiber lens |
EP2598942A4 (en) | 2010-07-30 | 2014-07-23 | Univ Leland Stanford Junior | Conductive films |
US8740432B2 (en) | 2010-08-25 | 2014-06-03 | Colorado State University Research Foundation | Transmission of laser pulses with high output beam quality using step-index fibers having large cladding |
KR101405414B1 (en) | 2010-08-26 | 2014-06-11 | 한국전자통신연구원 | optic fiber coupler, manufacturing method of the same and active optic module |
JP5694711B2 (en) | 2010-09-09 | 2015-04-01 | 株式会社アマダミヤチ | MOPA fiber laser processing device and laser diode power supply for excitation |
US8730568B2 (en) * | 2010-09-13 | 2014-05-20 | Calmar Optcom, Inc. | Generating laser pulses based on chirped pulse amplification |
US8433161B2 (en) | 2010-09-21 | 2013-04-30 | Textron Systems Corporation | All glass fiber laser cladding mode stripper |
US8554037B2 (en) | 2010-09-30 | 2013-10-08 | Raydiance, Inc. | Hybrid waveguide device in powerful laser systems |
FI125306B (en) | 2010-10-21 | 2015-08-31 | Rofin Sinar Laser Gmbh | Packaged fiber optic component and method of manufacture thereof |
JP4667535B1 (en) | 2010-11-02 | 2011-04-13 | 株式会社フジクラ | Amplifying optical fiber, and optical fiber amplifier and resonator using the same |
EP2646863A4 (en) | 2010-12-03 | 2015-04-08 | Ofs Fitel Llc | Large-mode-area optical fibers with bend compensation |
US9507084B2 (en) | 2010-12-03 | 2016-11-29 | Ofs Fitel, Llc | Single-mode, bend-compensated, large-mode-area optical fibers designed to accomodate simplified fabrication and tighter bends |
US20120148823A1 (en) | 2010-12-13 | 2012-06-14 | Innovation & Infinity Global Corp. | Transparent conductive structure and method of making the same |
US20120156458A1 (en) | 2010-12-16 | 2012-06-21 | Innovation & Infinity Global Corp. | Diffusion barrier structure, transparent conductive structure and method for making the same |
US10095016B2 (en) | 2011-01-04 | 2018-10-09 | Nlight, Inc. | High power laser system |
US8835804B2 (en) | 2011-01-04 | 2014-09-16 | Nlight Photonics Corporation | Beam homogenizer |
KR101180289B1 (en) | 2011-01-13 | 2012-09-07 | 연세대학교 산학협력단 | Hybrid photonic crystal fibers and the fabrication method of the same |
CN103338880B (en) | 2011-01-28 | 2015-04-22 | 阿卡姆股份有限公司 | Method for production of a three-dimensional body |
US9014220B2 (en) * | 2011-03-10 | 2015-04-21 | Coherent, Inc. | High-power CW fiber-laser |
US8903211B2 (en) * | 2011-03-16 | 2014-12-02 | Ofs Fitel, Llc | Pump-combining systems and techniques for multicore fiber transmissions |
WO2012141847A1 (en) | 2011-04-15 | 2012-10-18 | Bae Systems Information And Electronic Systems Integration Inc. | Integrated parameter monitoring in a fiber laser/amplifier |
GB2490143B (en) | 2011-04-20 | 2013-03-13 | Rolls Royce Plc | Method of manufacturing a component |
GB2490354A (en) | 2011-04-28 | 2012-10-31 | Univ Southampton | Laser with axially-symmetric beam profile |
DE102011075213B4 (en) | 2011-05-04 | 2013-02-21 | Trumpf Laser Gmbh + Co. Kg | Laser processing system with an adjustable laser beam in its brilliance |
US8974900B2 (en) | 2011-05-23 | 2015-03-10 | Carestream Health, Inc. | Transparent conductive film with hardcoat layer |
US9175183B2 (en) | 2011-05-23 | 2015-11-03 | Carestream Health, Inc. | Transparent conductive films, methods, and articles |
WO2012165389A1 (en) | 2011-05-31 | 2012-12-06 | 古河電気工業株式会社 | Laser device and machining device |
US9170367B2 (en) | 2011-06-16 | 2015-10-27 | Lawrence Livermore National Security, Llc | Waveguides having patterned, flattened modes |
JP5688333B2 (en) | 2011-06-23 | 2015-03-25 | 富士フイルム株式会社 | Polymer film, retardation film, polarizing plate, liquid crystal display device, Rth enhancer and merocyanine compound |
WO2013001734A1 (en) | 2011-06-29 | 2013-01-03 | パナソニック株式会社 | Fiber laser |
US8537871B2 (en) | 2011-07-11 | 2013-09-17 | Nlight Photonics Corporation | Fiber cladding light stripper |
US8804233B2 (en) | 2011-08-09 | 2014-08-12 | Ofs Fitel, Llc | Fiber assembly for all-fiber delivery of high energy femtosecond pulses |
US8774236B2 (en) * | 2011-08-17 | 2014-07-08 | Veralas, Inc. | Ultraviolet fiber laser system |
FR2980277B1 (en) | 2011-09-20 | 2013-10-11 | Commissariat Energie Atomique | HIGH-HEAD MICROSTRUCTURE OPTIC FIBER WITH BASIC FIXED MODE, AND METHOD FOR DESIGNING THE SAME, APPLICATION TO LASER MICROFABRICATION |
EP2587564A1 (en) | 2011-10-27 | 2013-05-01 | Merck Patent GmbH | Selective etching of a matrix comprising silver nanowires or carbon nanotubes |
DE102011119319A1 (en) | 2011-11-24 | 2013-05-29 | Slm Solutions Gmbh | Optical irradiation device for a plant for the production of three-dimensional workpieces by irradiation of powder layers of a raw material powder with laser radiation |
US9170359B2 (en) | 2011-11-29 | 2015-10-27 | Koninklijke Philips N.V. | Wave guide |
CN104136952B (en) | 2011-12-09 | 2018-05-25 | 朗美通运营有限责任公司 | The optical device and method accumulated for changing the light beam parameters of laser beam |
US9339890B2 (en) | 2011-12-13 | 2016-05-17 | Hypertherm, Inc. | Optimization and control of beam quality for material processing |
US9322989B2 (en) | 2011-12-14 | 2016-04-26 | Ofs Fitel, Llc | Optical fiber with distributed bend compensated filtering |
US9158066B2 (en) | 2011-12-14 | 2015-10-13 | Ofs Fitel, Llc | Bend compensated filter fiber |
JP6279484B2 (en) | 2011-12-19 | 2018-02-14 | アイピージー フォトニクス コーポレーション | 980nm high power single mode fiber pump laser system |
US9911550B2 (en) | 2012-03-05 | 2018-03-06 | Apple Inc. | Touch sensitive device with multiple ablation fluence values |
JP5216151B1 (en) | 2012-03-15 | 2013-06-19 | 株式会社フジクラ | Optical fiber combiner and laser device using the same |
US9200899B2 (en) | 2012-03-22 | 2015-12-01 | Virtek Vision International, Inc. | Laser projection system and method |
CN102621628A (en) | 2012-03-22 | 2012-08-01 | 华中科技大学 | Optical fiber with ring-shaped doped layer and preparation method thereof and laser containing optical fiber |
WO2013145840A1 (en) | 2012-03-28 | 2013-10-03 | 株式会社フジクラ | Fiber optic system and method for manufacturing same |
US9904002B2 (en) | 2012-05-11 | 2018-02-27 | Empire Technology Development Llc | Transparent illumination panels |
US8947768B2 (en) | 2012-05-14 | 2015-02-03 | Jds Uniphase Corporation | Master oscillator—power amplifier systems |
RU2528287C2 (en) | 2012-05-15 | 2014-09-10 | Открытое Акционерное Общество "Научно-Исследовательский Институт Технического Стекла" | Method of fragile non-metallic material laser cutting and device to this end |
US8953914B2 (en) | 2012-06-26 | 2015-02-10 | Corning Incorporated | Light diffusing fibers with integrated mode shaping lenses |
US8849078B2 (en) | 2012-09-24 | 2014-09-30 | Ipg Photonics Corporation | High power laser system with multiport circulator |
DE102012219074A1 (en) | 2012-10-19 | 2014-04-24 | Trumpf Werkzeugmaschinen Gmbh + Co. Kg | Laser cutting machine and method for cutting workpieces of different thickness |
JP6342912B2 (en) | 2012-11-08 | 2018-06-13 | ディーディーエム システムズ, インコーポレイテッド | Additive manufacturing and repair of metal components |
CN103056513B (en) | 2012-12-14 | 2014-12-10 | 武汉锐科光纤激光器技术有限责任公司 | Laser processing system |
US8948218B2 (en) | 2012-12-19 | 2015-02-03 | Ipg Photonics Corporation | High power fiber laser system with distributive mode absorber |
CN103022868B (en) * | 2012-12-25 | 2015-01-07 | 中国电子科技集团公司第十一研究所 | Pulse optical fiber laser |
KR102029122B1 (en) | 2012-12-28 | 2019-10-07 | 올리베티 에스.피.에이. | Multi-purpose printer |
GB2511923B (en) | 2013-01-28 | 2018-10-03 | Lumentum Operations Llc | A cladding light stripper and method of manufacturing |
US9842665B2 (en) | 2013-02-21 | 2017-12-12 | Nlight, Inc. | Optimization of high resolution digitally encoded laser scanners for fine feature marking |
US9217840B2 (en) * | 2013-02-28 | 2015-12-22 | Ipg Photonics Corporation | Low-mode high power fiber combiner |
WO2014144255A2 (en) | 2013-03-15 | 2014-09-18 | Matterfab Corp. | Laser sintering apparatus and methods |
WO2014143310A1 (en) | 2013-03-15 | 2014-09-18 | Rolls-Royce Corporation | Repair of gas turbine engine components |
SI2972528T1 (en) | 2013-03-15 | 2018-03-30 | Nlight, Inc. | Spun non-circular and non-elliptical fibers and apparatuses utilizing the same |
CN103173760A (en) | 2013-03-18 | 2013-06-26 | 张翀昊 | Method for improving compactness of 3D (three dimensional) printing metal part by adopting second laser beam |
DE102013205029A1 (en) | 2013-03-21 | 2014-09-25 | Siemens Aktiengesellschaft | Method for laser melting with at least one working laser beam |
EP2784045A1 (en) | 2013-03-29 | 2014-10-01 | Osseomatrix | Selective laser sintering/melting process |
US8988669B2 (en) | 2013-04-23 | 2015-03-24 | Jds Uniphase Corporation | Power monitor for optical fiber using background scattering |
ES2666379T3 (en) | 2013-04-29 | 2018-05-04 | Mark S. Zediker | Three-dimensional printing system and method using a visible laser light source |
EP2994737B1 (en) | 2013-05-06 | 2020-07-15 | Vrije Universiteit Brussel | Effective structural health monitoring |
US9496683B1 (en) | 2013-05-17 | 2016-11-15 | Nlight, Inc. | Wavelength locking multi-mode diode lasers with core FBG |
DE102013215362B4 (en) | 2013-08-05 | 2015-09-03 | Trumpf Werkzeugmaschinen Gmbh + Co. Kg | Method, computer program product and device for determining a welding depth in laser welding |
US9128259B2 (en) | 2013-08-16 | 2015-09-08 | Coherent, Inc. | Fiber-coupled laser with adjustable beam-parameter-product |
US20150096963A1 (en) | 2013-10-04 | 2015-04-09 | Gerald J. Bruck | Laser cladding with programmed beam size adjustment |
CN103490273A (en) | 2013-10-10 | 2014-01-01 | 武汉锐科光纤激光器技术有限责任公司 | High-power optical fiber transmission system |
WO2015057720A1 (en) | 2013-10-14 | 2015-04-23 | Huawei Technologies Co., Ltd. | System and method for optical fiber |
CN103521920B (en) | 2013-10-16 | 2015-09-30 | 江苏大学 | A kind of laser processing device without the need to blowing assist gas and method |
DE102013017792A1 (en) | 2013-10-28 | 2015-04-30 | Cl Schutzrechtsverwaltungs Gmbh | Method for producing a three-dimensional component |
CN103606803A (en) | 2013-11-07 | 2014-02-26 | 北京工业大学 | Fiber cladding light stripper for high-power fiber laser |
US9214781B2 (en) | 2013-11-21 | 2015-12-15 | Lockheed Martin Corporation | Fiber amplifier system for suppression of modal instabilities and method |
US10328685B2 (en) | 2013-12-16 | 2019-06-25 | General Electric Company | Diode laser fiber array for powder bed fabrication or repair |
US10532556B2 (en) | 2013-12-16 | 2020-01-14 | General Electric Company | Control of solidification in laser powder bed fusion additive manufacturing using a diode laser fiber array |
DE102013226298A1 (en) | 2013-12-17 | 2015-06-18 | MTU Aero Engines AG | Exposure to generative production |
DE112015000994B4 (en) | 2014-02-26 | 2024-01-18 | Panasonic Corporation of North America (n.d.Ges.d. Staates Delaware) | Systems for multi-beam laser arrangements with variable beam parameter products |
US9435964B2 (en) | 2014-02-26 | 2016-09-06 | TeraDiode, Inc. | Systems and methods for laser systems with variable beam parameter product |
US9366887B2 (en) | 2014-02-26 | 2016-06-14 | TeraDiode, Inc. | Systems and methods for laser systems with variable beam parameter product utilizing thermo-optic effects |
US10343237B2 (en) | 2014-02-28 | 2019-07-09 | Ipg Photonics Corporation | System and method for laser beveling and/or polishing |
EP2921285B1 (en) | 2014-03-21 | 2018-05-02 | British Telecommunications public limited company | Printed apparatus comprising a 3D printed thermionic device and method and apparatus for its manufacture |
US20150283613A1 (en) | 2014-04-02 | 2015-10-08 | Arcam Ab | Method for fusing a workpiece |
JP2015206993A (en) | 2014-04-09 | 2015-11-19 | 住友電気工業株式会社 | Grating manufacturing apparatus and grating manufacturing method |
WO2015189883A1 (en) | 2014-06-09 | 2015-12-17 | 株式会社日立製作所 | Laser welding method |
US9397466B2 (en) | 2014-07-11 | 2016-07-19 | Nlight, Inc. | High power chirally coupled core optical amplification systems and methods |
US10310201B2 (en) | 2014-08-01 | 2019-06-04 | Nlight, Inc. | Back-reflection protection and monitoring in fiber and fiber-delivered lasers |
US9638867B2 (en) | 2014-10-06 | 2017-05-02 | Corning Incorporated | Skew managed multi-core optical fiber interconnects |
US9634462B2 (en) | 2014-10-15 | 2017-04-25 | Nlight, Inc. | Slanted FBG for SRS suppression |
EP3210063A4 (en) | 2014-10-23 | 2018-06-20 | Coractive High-Tech Inc. | Optical fiber assembly with beam shaping component |
US10112262B2 (en) | 2014-10-28 | 2018-10-30 | General Electric Company | System and methods for real-time enhancement of build parameters of a component |
US10048661B2 (en) | 2014-12-17 | 2018-08-14 | General Electric Company | Visualization of additive manufacturing process data |
EP3045300A1 (en) | 2015-01-15 | 2016-07-20 | Airbus Operations GmbH | Stiffening component and method for manufacturing a stiffening component |
US9837783B2 (en) | 2015-01-26 | 2017-12-05 | Nlight, Inc. | High-power, single-mode fiber sources |
DE102015103127A1 (en) | 2015-03-04 | 2016-09-08 | Trumpf Laser- Und Systemtechnik Gmbh | Irradiation system for a device for additive manufacturing |
US10050404B2 (en) | 2015-03-26 | 2018-08-14 | Nlight, Inc. | Fiber source with cascaded gain stages and/or multimode delivery fiber with low splice loss |
US9325151B1 (en) | 2015-03-27 | 2016-04-26 | Ofs Fitel, Llc | Systems and techniques for compensation for the thermo-optic effect in active optical fibers |
US9667025B2 (en) | 2015-04-06 | 2017-05-30 | Bae Systems Information And Electronic Systems Integration Inc. | System and method for increasing power emitted from a fiber laser |
RU2611738C2 (en) | 2015-04-08 | 2017-02-28 | Иван Владимирович Мазилин | Method for application and laser treatment of thermal-protective coating (versions) |
US11022760B2 (en) | 2015-04-29 | 2021-06-01 | Nlight, Inc. | Portable industrial fiber optic inspection scope |
US10246742B2 (en) | 2015-05-20 | 2019-04-02 | Quantum-Si Incorporated | Pulsed laser and bioanalytic system |
GB201510220D0 (en) | 2015-06-11 | 2015-07-29 | Renishaw Plc | Additive manufacturing apparatus and method |
CN107924023B (en) | 2015-07-08 | 2020-12-01 | 恩耐公司 | Fibers having suppressed center refractive index for increased beam parameter product |
CN104999670B (en) | 2015-08-25 | 2017-05-10 | 长春理工大学 | Multi-beam laser interference cross-scale 3D (three dimension) printing system and method |
CN108369315B (en) | 2015-09-24 | 2020-08-04 | 恩耐公司 | Apparatus and method for controlling beam parameter product |
US10207489B2 (en) | 2015-09-30 | 2019-02-19 | Sigma Labs, Inc. | Systems and methods for additive manufacturing operations |
IL287642B (en) | 2015-10-30 | 2022-07-01 | Seurat Tech Inc | Additive manufacturing system and apparatus |
US9917410B2 (en) | 2015-12-04 | 2018-03-13 | Nlight, Inc. | Optical mode filter employing radially asymmetric fiber |
CN105383060B (en) | 2015-12-07 | 2017-10-17 | 济南鲁洋科技有限公司 | A kind of 3D printing feed, fluxing and crystallization in motion leveling integrated apparatus |
WO2017136831A1 (en) | 2016-02-05 | 2017-08-10 | Nufern | Mode mixing optical fibers and methods and systems using the same |
EP3430692B1 (en) | 2016-03-18 | 2022-05-25 | NLIGHT, Inc. | Spectrally multiplexing diode pump modules to improve brightness |
JP6796142B2 (en) | 2016-04-06 | 2020-12-02 | テラダイオード, インコーポレーテッド | Fiber Optic Structures and Methods for Variable Laser Beam Profiles |
US10114172B2 (en) | 2016-06-20 | 2018-10-30 | Ofs Fitel, Llc | Multimode beam combiner |
DE202016004237U1 (en) | 2016-08-17 | 2016-08-23 | Kredig GmbH | positioning |
US10730785B2 (en) | 2016-09-29 | 2020-08-04 | Nlight, Inc. | Optical fiber bending mechanisms |
CN109791252B (en) | 2016-09-29 | 2021-06-29 | 恩耐公司 | Adjustable beam characteristics |
-
2014
- 2014-06-02 US US14/293,941 patent/US10069271B2/en active Active
-
2015
- 2015-06-02 CN CN201911126909.0A patent/CN110854655A/en active Pending
- 2015-06-02 CN CN201510295923.9A patent/CN105161958B/en active Active
-
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- 2018-03-05 US US15/912,034 patent/US10971885B2/en active Active
-
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- 2021-04-05 US US17/222,313 patent/US20210226405A1/en not_active Abandoned
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10971885B2 (en) * | 2014-06-02 | 2021-04-06 | Nlight, Inc. | Scalable high power fiber laser |
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